#ifndef MOSFET_A_PIN

Try assigning the pin number directly in configuration.h in case you changed it in wrong #ifdef section in pins.h and as said make sure no other function has same pin number. Only heaters and fans and

#ifndef IGNORE_TMC5160_FEEDBACK

#ifndef SDSUPPORT  // Some boards have sd support on board. These define the values already in pins.h

#if screen is rotated, you need to transform the touch-matrix as per the below:

#if ENABLED(FILAMENT_RUNOUT_SENSOR)

#if HOMING_ORDER != HOME_ORDER_XYZ && HOMING_ORDER != HOME_ORDER_YXZ && HOMING_ORDER != HOME_ORDER_ZXYTZ && HOMING_ORDER != HOME_ORDER_XYTZ

#if FILAMENTCHANGE_REHOME

#if FILAMENTCHANGE_REHOME

#if Z_PROBE_Z_OFFSET_MODE == 1

#if HAS_TMC_UART

#if PRINTER_TYPE == 2

#ifdef DEBUG_MOVES

#if PRINTER_TYPE == 2

#ifndef SERVO0_PIN

#if ENABLED(EEPROM_SETTINGS)

#if ENABLED(LIMITED_MAX_FR_EDITING)

#ifndef MOTHERBOARD

#if ENABLED(HOST_ACTION_COMMANDS)

I guess. Inside the #if ENABLED you can add further options for hosts like adding prompt support. You could add that as we support prompts as well, but with that feature it is not necessary.