diff --git a/Marlin/src/HAL/AVR/HAL.h b/Marlin/src/HAL/AVR/HAL.h
index 3c883b645c..6b9c7c7cdd 100644
--- a/Marlin/src/HAL/AVR/HAL.h
+++ b/Marlin/src/HAL/AVR/HAL.h
@@ -141,7 +141,7 @@ typedef Servo hal_servo_t;
     #error "LCD_SERIAL_PORT must be from 0 to 3."
   #endif
   #define LCD_SERIAL lcdSerial
-  #if HAS_DGUS_LCD
+  #if HAS_DGUS_LCD || ENABLED(EXTENSIBLE_UI)
     #define LCD_SERIAL_TX_BUFFER_FREE() LCD_SERIAL.get_tx_buffer_free()
   #endif
 #endif
diff --git a/Marlin/src/HAL/AVR/MarlinSerial.cpp b/Marlin/src/HAL/AVR/MarlinSerial.cpp
index 986462437c..5342819f6e 100644
--- a/Marlin/src/HAL/AVR/MarlinSerial.cpp
+++ b/Marlin/src/HAL/AVR/MarlinSerial.cpp
@@ -629,7 +629,7 @@ MSerialT1 customizedSerial1(MSerialT1::HasEmergencyParser);
   template class MarlinSerial< LCDSerialCfg<LCD_SERIAL_PORT> >;
   MSerialLCD lcdSerial(MSerialLCD::HasEmergencyParser);
 
-  #if HAS_DGUS_LCD
+  #if HAS_DGUS_LCD || ENABLED(EXTENSIBLE_UI)
     template<typename Cfg>
     typename MarlinSerial<Cfg>::ring_buffer_pos_t MarlinSerial<Cfg>::get_tx_buffer_free() {
       const ring_buffer_pos_t t = tx_buffer.tail,  // next byte to send.
diff --git a/Marlin/src/HAL/AVR/MarlinSerial.h b/Marlin/src/HAL/AVR/MarlinSerial.h
index a40730e0a8..34668388ae 100644
--- a/Marlin/src/HAL/AVR/MarlinSerial.h
+++ b/Marlin/src/HAL/AVR/MarlinSerial.h
@@ -205,7 +205,7 @@
     static ring_buffer_pos_t available();
     static void write(const uint8_t c);
     static void flushTX();
-    #if HAS_DGUS_LCD
+    #if HAS_DGUS_LCD || ENABLED(EXTENSIBLE_UI)
       static ring_buffer_pos_t get_tx_buffer_free();
     #endif
 
diff --git a/Marlin/src/HAL/LPC1768/HAL.h b/Marlin/src/HAL/LPC1768/HAL.h
index ab28e06eb8..42ff661248 100644
--- a/Marlin/src/HAL/LPC1768/HAL.h
+++ b/Marlin/src/HAL/LPC1768/HAL.h
@@ -100,7 +100,7 @@ extern DefaultSerial1 USBSerial;
   #else
     #error "LCD_SERIAL_PORT must be from 0 to 3. You can also use -1 if the board supports Native USB."
   #endif
-  #if HAS_DGUS_LCD
+  #if HAS_DGUS_LCD || ENABLED(EXTENSIBLE_UI)
     #define LCD_SERIAL_TX_BUFFER_FREE() LCD_SERIAL.available()
   #endif
 #endif
diff --git a/Marlin/src/HAL/STM32/HAL.h b/Marlin/src/HAL/STM32/HAL.h
index 276f031685..efa0228ad3 100644
--- a/Marlin/src/HAL/STM32/HAL.h
+++ b/Marlin/src/HAL/STM32/HAL.h
@@ -112,7 +112,7 @@
   #else
     #error "LCD_SERIAL_PORT must be from 1 to 9, or -1 for Native USB."
   #endif
-  #if HAS_DGUS_LCD
+  #if HAS_DGUS_LCD || ENABLED(EXTENSIBLE_UI)
     #define LCD_SERIAL_TX_BUFFER_FREE() LCD_SERIAL.availableForWrite()
   #endif
 #endif
diff --git a/Marlin/src/HAL/STM32/MarlinSerial.h b/Marlin/src/HAL/STM32/MarlinSerial.h
index 4ab1e4e75a..e1ea1b2751 100644
--- a/Marlin/src/HAL/STM32/MarlinSerial.h
+++ b/Marlin/src/HAL/STM32/MarlinSerial.h
@@ -53,6 +53,7 @@
     inline void begin(unsigned long baud) { begin(baud, SERIAL_8N1); }
 
     void _rx_complete_irq(serial_t *obj);
+    FORCE_INLINE static uint8_t buffer_overruns() { return 0; } // Not implemented, but set as void to avoid platform dependant code
 
     protected:
       usart_rx_callback_t _rx_callback;
diff --git a/Marlin/src/HAL/STM32F1/HAL.h b/Marlin/src/HAL/STM32F1/HAL.h
index 41c91e200f..993f380d92 100644
--- a/Marlin/src/HAL/STM32F1/HAL.h
+++ b/Marlin/src/HAL/STM32F1/HAL.h
@@ -138,7 +138,7 @@
     #define LCD_SERIAL MSERIAL(1) // dummy port
     static_assert(false, "LCD_SERIAL_PORT must be from 1 to " STRINGIFY(NUM_UARTS) ". You can also use -1 if the board supports Native USB.")
   #endif
-  #if HAS_DGUS_LCD
+  #if HAS_DGUS_LCD || ENABLED(EXTENSIBLE_UI)
     #define LCD_SERIAL_TX_BUFFER_FREE() LCD_SERIAL.availableForWrite()
   #endif
 #endif
diff --git a/Marlin/src/feature/pause.cpp b/Marlin/src/feature/pause.cpp
index 8756c339e3..ce850e7e3b 100644
--- a/Marlin/src/feature/pause.cpp
+++ b/Marlin/src/feature/pause.cpp
@@ -288,7 +288,7 @@ bool load_filament(const_float_t slow_load_length/*=0*/, const_float_t fast_load
           // Show "Purge More" / "Resume" menu and wait for reply
           KEEPALIVE_STATE(PAUSED_FOR_USER);
           wait_for_user = false;
-          #if ANY(HAS_MARLINUI_MENU, DWIN_LCD_PROUI)
+          #if ANY(HAS_MARLINUI_MENU, DWIN_LCD_PROUI, EXTENSIBLE_UI)
             ui.pause_show_message(PAUSE_MESSAGE_OPTION); // Also sets PAUSE_RESPONSE_WAIT_FOR
           #else
             pause_menu_response = PAUSE_RESPONSE_WAIT_FOR;
diff --git a/Marlin/src/gcode/bedlevel/abl/G29.cpp b/Marlin/src/gcode/bedlevel/abl/G29.cpp
index 1ca3826c81..11e5f35a06 100644
--- a/Marlin/src/gcode/bedlevel/abl/G29.cpp
+++ b/Marlin/src/gcode/bedlevel/abl/G29.cpp
@@ -993,6 +993,8 @@ G29_TYPE GcodeSuite::G29() {
     process_subcommands_now(F(EVENT_GCODE_AFTER_G29));
   #endif
 
+  TERN_(EXTENSIBLE_UI, ExtUI::onLevelingDone());
+
   probe.use_probing_tool(false);
 
   report_current_position();
diff --git a/Marlin/src/gcode/probe/G30.cpp b/Marlin/src/gcode/probe/G30.cpp
index e83df544c8..e84f9ea5bc 100644
--- a/Marlin/src/gcode/probe/G30.cpp
+++ b/Marlin/src/gcode/probe/G30.cpp
@@ -83,7 +83,7 @@ void GcodeSuite::G30() {
         F(  " Z:"), p_float_t(measured_z, 3)
       );
       msg.echoln();
-      #if ANY(DWIN_LCD_PROUI, DWIN_CREALITY_LCD_JYERSUI)
+      #if ANY(DWIN_LCD_PROUI, DWIN_CREALITY_LCD_JYERSUI, EXTENSIBLE_UI)
         ui.set_status(msg);
       #endif
     }
diff --git a/Marlin/src/inc/SanityCheck.h b/Marlin/src/inc/SanityCheck.h
index 27629c5a7d..589da31d82 100644
--- a/Marlin/src/inc/SanityCheck.h
+++ b/Marlin/src/inc/SanityCheck.h
@@ -3568,7 +3568,7 @@ static_assert(_PLUS_TEST(3), "DEFAULT_MAX_ACCELERATION values must be positive."
   #error "LED_CONTROL_MENU requires an LCD controller that implements the menu."
 #endif
 
-#if ENABLED(CUSTOM_MENU_MAIN) && NONE(HAS_MARLINUI_MENU, TOUCH_UI_FTDI_EVE, TFT_LVGL_UI)
+#if ENABLED(CUSTOM_MENU_MAIN) && NONE(HAS_MARLINUI_MENU, TOUCH_UI_FTDI_EVE, TFT_LVGL_UI, EXTENSIBLE_UI)
   #error "CUSTOM_MENU_MAIN requires an LCD controller that implements the menu."
 #endif
 
diff --git a/Marlin/src/lcd/extui/ui_api.cpp b/Marlin/src/lcd/extui/ui_api.cpp
index 2ba01a694d..8b4f1ce7ae 100644
--- a/Marlin/src/lcd/extui/ui_api.cpp
+++ b/Marlin/src/lcd/extui/ui_api.cpp
@@ -765,6 +765,26 @@ namespace ExtUI {
     }
   #endif
 
+  #if HAS_SHAPING
+    float getShapingZeta(const axis_t axis) {
+      return stepper.get_shaping_damping_ratio(AxisEnum(axis));
+    }
+    void setShapingZeta(const float zeta, const axis_t axis) {
+      if (WITHIN(zeta, 0, 1)) {
+        stepper.set_shaping_damping_ratio(AxisEnum(axis), zeta);
+      }
+    }
+    float getShapingFrequency(const axis_t axis) {
+      return stepper.get_shaping_frequency(AxisEnum(axis));
+    }
+    void setShapingFrequency(const float freq, const axis_t axis) {
+      constexpr float min_freq = float(uint32_t(STEPPER_TIMER_RATE) / 2) / shaping_time_t(-2);
+      if (freq == 0.0f || freq > min_freq) {
+        stepper.set_shaping_frequency(AxisEnum(axis), freq);
+      }
+    }
+  #endif
+
   #if HAS_JUNCTION_DEVIATION
 
     float getJunctionDeviation_mm() { return planner.junction_deviation_mm; }
@@ -933,6 +953,7 @@ namespace ExtUI {
   #if HAS_BED_PROBE
     float getProbeOffset_mm(const axis_t axis) { return probe.offset.pos[axis]; }
     void setProbeOffset_mm(const_float_t val, const axis_t axis) { probe.offset.pos[axis] = val; }
+    probe_limits getBedProbeLimits() {return (probe_limits){probe.min_x(), probe.min_y(), probe.max_x(), probe.max_y()};}
   #endif
 
   #if ENABLED(BACKLASH_GCODE)
@@ -1140,7 +1161,7 @@ namespace ExtUI {
     return isPrinting() && (isPrintingFromMediaPaused() || print_job_timer.isPaused());
   }
 
-  bool isMediaInserted() { return TERN0(HAS_MEDIA, IS_SD_INSERTED()); }
+  bool isMediaInserted() { return TERN0(HAS_MEDIA, IS_SD_INSERTED() || card.isMounted()); }
 
   // Pause/Resume/Stop are implemented in MarlinUI
   void pausePrint()  { ui.pause_print(); }
diff --git a/Marlin/src/lcd/extui/ui_api.h b/Marlin/src/lcd/extui/ui_api.h
index 50ecd13d75..e8bf9f30e2 100644
--- a/Marlin/src/lcd/extui/ui_api.h
+++ b/Marlin/src/lcd/extui/ui_api.h
@@ -64,6 +64,7 @@ namespace ExtUI {
   enum heater_t   : uint8_t { H0, H1, H2, H3, H4, H5, BED, CHAMBER, COOLER };
   enum fan_t      : uint8_t { FAN0, FAN1, FAN2, FAN3, FAN4, FAN5, FAN6, FAN7 };
   enum result_t   : uint8_t { PID_STARTED, PID_BAD_HEATER_ID, PID_TEMP_TOO_HIGH, PID_TUNING_TIMEOUT, PID_DONE };
+  struct probe_limits { float pos[4];};
 
   constexpr uint8_t extruderCount = EXTRUDERS;
   constexpr uint8_t hotendCount   = HOTENDS;
@@ -300,6 +301,13 @@ namespace ExtUI {
     void setLinearAdvance_mm_mm_s(const_float_t, const extruder_t);
   #endif
 
+  #if HAS_SHAPING
+    float getShapingZeta(const axis_t);
+    void setShapingZeta(const float, const axis_t);
+    float getShapingFrequency(const axis_t);
+    void setShapingFrequency(const float, const axis_t);
+  #endif
+
   // JD or Jerk Control
   #if HAS_JUNCTION_DEVIATION
     float getJunctionDeviation_mm();
@@ -340,6 +348,7 @@ namespace ExtUI {
   #if HAS_BED_PROBE
     float getProbeOffset_mm(const axis_t);
     void setProbeOffset_mm(const_float_t, const axis_t);
+    probe_limits getBedProbeLimits();
   #endif
 
   // Backlash Control