Wanhao D6 uses TINYBOY2 (#16117)

config/examples/Wanhao/Duplicator 6/Configuration.h

 //
 // ULTIPANEL as seen on Thingiverse.
 //
-#define ULTIPANEL
+//#define ULTIPANEL
 
 //
 // PanelOne from T3P3 (via RAMPS 1.4 AUX2/AUX3)
 //
 // SSD1306 OLED full graphics generic display
 //
-#define U8GLIB_SSD1306
-#define LCD_WIDTH 22
-#define LCD_HEIGHT 5
-#define LCD_RESET_PIN 5
+//#define U8GLIB_SSD1306
 
 //
 // SAV OLEd LCD module support using either SSD1306 or SH1106 based LCD modules
 //
 // TinyBoy2 128x64 OLED / Encoder Panel
 //
-//#define OLED_PANEL_TINYBOY2
+#define OLED_PANEL_TINYBOY2
+#define LCD_RESET_PIN 5
 
 //
 // MKS OLED 1.3" 128 × 64 FULL GRAPHICS CONTROLLER