A ‘diff’ of the MSFS 2020 & 2024 SDK docs Event lists. Thanks to MS/Asobo:
AXIS_BURNER_PITCH_SET
AXIS_BURNER_ROLL_SET
BALLOON_VENT_CLOSE
BALLOON_VENT_OPEN
BALLOON_VENT_SET
BALLOON_VENT_TOGGLE
BURNER_PITCH_DEC
BURNER_PITCH_INC
BURNER_ROLL_DEC
BURNER_ROLL_INC
BURNER_VALVE_CLOSE
BURNER_VALVE_OPEN
BURNER_VALVE_SET
BURNER_VALVE_TOGGLE
ELECTRICAL_LINE_BREAKER_SET
ELECTRICAL_LINE_BREAKER_TOGGLE
ELECTRICAL_LINE_CONNECTION_SET
ELECTRICAL_LINE_CONNECTION_TOGGLE
HYDRAULIC_VALVE_CLOSE
HYDRAULIC_VALVE_OPEN
HYDRAULIC_VALVE_SET
HYDRAULIC_VALVE_TOGGLE
LIQUID_DROPPING_SYSTEM_DOOR_CLOSE
LIQUID_DROPPING_SYSTEM_DOOR_COMMAND_GROUP_CLOSE
LIQUID_DROPPING_SYSTEM_DOOR_COMMAND_GROUP_OPEN
LIQUID_DROPPING_SYSTEM_DOOR_COMMAND_GROUP_SET
LIQUID_DROPPING_SYSTEM_DOOR_COMMAND_GROUP_TOGGLE
LIQUID_DROPPING_SYSTEM_DOOR_OPEN
LIQUID_DROPPING_SYSTEM_DOOR_SET
LIQUID_DROPPING_SYSTEM_DOOR_TOGGLE
LIQUID_DROPPING_SYSTEM_SCOOP_CLOSE
LIQUID_DROPPING_SYSTEM_SCOOP_OPEN
LIQUID_DROPPING_SYSTEM_SCOOP_SET
LIQUID_DROPPINGSYSTEM_SCOOP_TOGGLE
PNEUMATICS_AREA_TEMPERATURE_DEC
PNEUMATICS_AREA_TEMPERATURE_INC
PNEUMATICS_AREA_TEMPERATURE_SET
PNEUMATICS_FAN_SET
PNEUMATICS_JUNCTION_LINE_OPENING_STATUS_SET
PNEUMATICS_PACK_FLOW_AUTO_OFF
PNEUMATICS_PACK_FLOW_AUTO_ON
PNEUMATICS_PACK_FLOW_AUTO_SET
PNEUMATICS_PACK_FLOW_MODE_HIGH
PNEUMATICS_PACK_FLOW_MODE_LOW
PNEUMATICS_PACK_FLOW_MODE_NORM
PNEUMATICS_PACK_FLOW_MODE_SET
PNEUMATICS_PACK_OFF
PNEUMATICS_PACK_ON
PNEUMATICS_PACK_SET
PNEUMATICS_PACK_TOGGLE
PNEUMATICS_PACKS_FLOW_DEC
PNEUMATICS_PACKS_FLOW_INC
PNEUMATICS_PACKS_FLOW_SET
PNEUMATICS_TARGET_CABIN_ALTITUDE_DEC
PNEUMATICS_TARGET_CABIN_ALTITUDE_INC
PNEUMATICS_TARGET_CABIN_ALTITUDE_SET
PNEUMATICS_VALVE_CLOSE
PNEUMATICS_VALVE_MODE_AUTO
PNEUMATICS_VALVE_MODE_CLOSED
PNEUMATICS_VALVE_MODE_OPEN
PNEUMATICS_VALVE_MODE_SET
PNEUMATICS_VALVE_OPEN
PNEUMATICS_VALVE_SET
PNEUMATICS_VALVE_TOGGLE