diff --git a/Marlin/src/Marlin.cpp b/Marlin/src/Marlin.cpp
index f9edc472c7..bb1f68d12b 100644
--- a/Marlin/src/Marlin.cpp
+++ b/Marlin/src/Marlin.cpp
@@ -733,7 +733,7 @@ void kill(PGM_P const lcd_msg/*=NULL*/) {
 
   SERIAL_ERROR_MSG(MSG_ERR_KILLED);
 
-  #if HAS_SPI_LCD || ENABLED(EXTENSIBLE_UI)
+  #if HAS_DISPLAY
     ui.kill_screen(lcd_msg ? lcd_msg : PSTR(MSG_KILLED));
   #else
     UNUSED(lcd_msg);
diff --git a/Marlin/src/inc/Conditionals_LCD.h b/Marlin/src/inc/Conditionals_LCD.h
index 752e399d7f..e447e06a51 100644
--- a/Marlin/src/inc/Conditionals_LCD.h
+++ b/Marlin/src/inc/Conditionals_LCD.h
@@ -329,8 +329,14 @@
   #define ULTRA_LCD
 #endif
 
+// Extensible UI serial touch screens. (See src/lcd/extensible_ui)
+#if ENABLED(MALYAN_LCD)
+  #define EXTENSIBLE_UI
+#endif
+
 // Aliases for LCD features
 #define HAS_SPI_LCD          ENABLED(ULTRA_LCD)
+#define HAS_DISPLAY         (HAS_SPI_LCD || ENABLED(EXTENSIBLE_UI))
 #define HAS_GRAPHICAL_LCD    ENABLED(DOGLCD)
 #define HAS_CHARACTER_LCD   (HAS_SPI_LCD && !HAS_GRAPHICAL_LCD)
 #define HAS_LCD_MENU        (ENABLED(ULTIPANEL) && DISABLED(NO_LCD_MENUS))
@@ -513,9 +519,6 @@
   #define GRID_MAX_POINTS ((GRID_MAX_POINTS_X) * (GRID_MAX_POINTS_Y))
 #endif
 
-#if ENABLED(MALYAN_LCD)
-  #define EXTENSIBLE_UI
-#endif
 #define HAS_SOFTWARE_ENDSTOPS EITHER(MIN_SOFTWARE_ENDSTOPS, MAX_SOFTWARE_ENDSTOPS)
 #define HAS_RESUME_CONTINUE   ANY(EXTENSIBLE_UI, NEWPANEL, EMERGENCY_PARSER)
 #define HAS_COLOR_LEDS        ANY(BLINKM, RGB_LED, RGBW_LED, PCA9632, PCA9533, NEOPIXEL_LED)
diff --git a/Marlin/src/lcd/malyanlcd.cpp b/Marlin/src/lcd/malyanlcd.cpp
index 8a6d611bd9..a3462d295d 100644
--- a/Marlin/src/lcd/malyanlcd.cpp
+++ b/Marlin/src/lcd/malyanlcd.cpp
@@ -474,52 +474,28 @@ namespace ExtUI {
     #endif
   }
 
-  void onPrinterKilled(PGM_P const msg) {}
-  void onMediaInserted() {};
-  void onMediaError() {};
-  void onMediaRemoved() {};
-  void onPlayTone(const uint16_t frequency, const uint16_t duration) {}
-  void onPrintTimerStarted() {}
-  void onPrintTimerPaused() {}
-  void onPrintTimerStopped() {}
-  void onFilamentRunout() {}
-  void onUserConfirmRequired(const char * const msg) {}
   void onStatusChanged(const char * const msg) {
     write_to_lcd_P(PSTR("{E:"));
     write_to_lcd(msg);
     write_to_lcd_P("}");
   }
+
+  // Not needed for Malyan LCD
+  void onPrinterKilled(PGM_P const msg) { UNUSED(msg); }
+  void onMediaInserted() {};
+  void onMediaError() {};
+  void onMediaRemoved() {};
+  void onPlayTone(const uint16_t frequency, const uint16_t duration) { UNUSED(frequency); UNUSED(duration); }
+  void onPrintTimerStarted() {}
+  void onPrintTimerPaused() {}
+  void onPrintTimerStopped() {}
+  void onFilamentRunout() {}
+  void onUserConfirmRequired(const char * const msg) { UNUSED(msg); }
   void onFactoryReset() {}
-
-  void onStoreSettings(char *buff) {
-    // This is called when saving to EEPROM (i.e. M500). If the ExtUI needs
-    // permanent data to be stored, it can write up to eeprom_data_size bytes
-    // into buff.
-
-    // Example:
-    //  static_assert(sizeof(myDataStruct) <= ExtUI::eeprom_data_size);
-    //  memcpy(buff, &myDataStruct, sizeof(myDataStruct));
-  }
-
-  void onLoadSettings(const char *buff) {
-    // This is called while loading settings from EEPROM. If the ExtUI
-    // needs to retrieve data, it should copy up to eeprom_data_size bytes
-    // from buff
-
-    // Example:
-    //  static_assert(sizeof(myDataStruct) <= ExtUI::eeprom_data_size);
-    //  memcpy(&myDataStruct, buff, sizeof(myDataStruct));
-  }
-
-  void onConfigurationStoreWritten(bool success) {
-    // This is called after the entire EEPROM has been written,
-    // whether successful or not.
-  }
-
-  void onConfigurationStoreRead(bool success) {
-    // This is called after the entire EEPROM has been read,
-    // whether successful or not.
-  }
+  void onStoreSettings(char *buff) { UNUSED(buff); }
+  void onLoadSettings(const char *buff) { UNUSED(buff); }
+  void onConfigurationStoreWritten(bool success) { UNUSED(success); }
+  void onConfigurationStoreRead(bool success) { UNUSED(success); }
 }
 
 #endif // MALYAN_LCD
diff --git a/Marlin/src/lcd/ultralcd.cpp b/Marlin/src/lcd/ultralcd.cpp
index 2208b6b1bf..b17c4c6e03 100644
--- a/Marlin/src/lcd/ultralcd.cpp
+++ b/Marlin/src/lcd/ultralcd.cpp
@@ -23,7 +23,7 @@
 #include "../inc/MarlinConfigPre.h"
 
 // These displays all share the MarlinUI class
-#if HAS_SPI_LCD || ENABLED(EXTENSIBLE_UI)
+#if HAS_DISPLAY
   #include "ultralcd.h"
   #include "fontutils.h"
   MarlinUI ui;
@@ -1192,7 +1192,7 @@ void MarlinUI::update() {
 
 #endif // HAS_SPI_LCD
 
-#if HAS_SPI_LCD || ENABLED(EXTENSIBLE_UI)
+#if HAS_DISPLAY
 
   #if ENABLED(EXTENSIBLE_UI)
     #include "extensible_ui/ui_api.h"
@@ -1376,4 +1376,4 @@ void MarlinUI::update() {
     }
   #endif
 
-#endif // HAS_SPI_LCD || EXTENSIBLE_UI
+#endif // HAS_DISPLAY
diff --git a/Marlin/src/lcd/ultralcd.h b/Marlin/src/lcd/ultralcd.h
index 2ea7f45279..95235d031a 100644
--- a/Marlin/src/lcd/ultralcd.h
+++ b/Marlin/src/lcd/ultralcd.h
@@ -268,17 +268,11 @@ public:
   static void clear_lcd();
   static void init_lcd();
 
-  #if HAS_SPI_LCD || EITHER(MALYAN_LCD, EXTENSIBLE_UI)
+  #if HAS_DISPLAY
+
     static void init();
     static void update();
     static void set_alert_status_P(PGM_P message);
-  #else // NO LCD
-    static inline void init() {}
-    static inline void update() {}
-    static inline void set_alert_status_P(PGM_P message) { UNUSED(message); }
-  #endif
-
-  #if HAS_SPI_LCD || ENABLED(EXTENSIBLE_UI)
 
     static char status_message[];
     static bool has_status();
@@ -375,9 +369,12 @@ public:
     static void status_printf_P(const uint8_t level, PGM_P const fmt, ...);
     static void reset_status();
 
-  #else // MALYAN_LCD or NO LCD
+  #else // No LCD
 
+    static inline void init() {}
+    static inline void update() {}
     static inline void refresh() {}
+    static inline void set_alert_status_P(PGM_P message) { UNUSED(message); }
     static inline void set_status(const char* const message, const bool persist=false) { UNUSED(message); UNUSED(persist); }
     static inline void set_status_P(PGM_P const message, const int8_t level=0) { UNUSED(message); UNUSED(level); }
     static inline void status_printf_P(const uint8_t level, PGM_P const fmt, ...) { UNUSED(level); UNUSED(fmt); }
@@ -529,7 +526,7 @@ private:
 
   static void _synchronize();
 
-  #if HAS_SPI_LCD || ENABLED(EXTENSIBLE_UI)
+  #if HAS_DISPLAY
     static void finish_status(const bool persist);
   #endif