How to Assign Throttle Detents to a Keyboard

[Sartanius]

Just getting started with the A350 and wanted to set it up to be like my other 3rd party Airbus aircraft.  I do not have a hardware throttle quadrant, instead I have a ThrustMaster T.1600M FCS joystick, and the throttle is a simple slider. With other Airbus aircraft the IDLE, CLB, FLX MCT, and TOGA detents can all be controlled with my keyboard function keys, but this doesn't seem possible with the A350 since the software detents don't seem to be modeled like this. 

With the A350 throttle in IDLE, when I hit F4 (assigned to "THROTTLE NEXT DETENT" in MSFS2024 Settings) the throttle jumps up to TOGA.  In my other Airbus aircraft, it stops at CLB, then on the next press it moves to FLX MCT, and then finally with the 3rd press it moves to TOGA.

Is there any way to duplicate this behavior in the A350 using my function keys?  I have searched here and on YT and found nothing.  Thanks in advance for any help/suggestions.

Doug

Edited Saturday at 10:40 PM by Sartanius

[DroneSim]

I can confirm this behavior on behalf of a user that commented on one of my videos. He has a similar issue with turning on the APU with the keyboard.