I’m using a registered version of FSUIPC.
My Trim up/down buttons are disabled in the CLS2sim software (4.24.9) but I use the “Not bound/USB button”. In the FSUIPC software and in the Button/Switch tab I select these “Elev Trim Up/Trim Down” functions and also the “enable control to repeat while held.
Note: I don’t have the A2A172 but the A2A182.
For me, the trim works the way I think it’s good. No heavy up/dwn reaction.
Ps I am not a real world pilot