Hi John, all,
no idea, if this the same problem (or a similar one), but since SU10, MSFS does not recognize the flaps axis anymore. I am using a Jetmax TQ and have mapped the axes using FSUIPC. As long as I do not use the FSUIPC calibration feature (i.e. starting with a new and empty fsuipc.ini file), I can map the flap axis and it works. As soon as I calibrate the axis, the flap lever does not move anymore.
The flaps also work, when mapping the Jetmax axis to the flaps directly in the MSFS controller menue, so my assumption (just as Leo stated above) that this be a "communication issue" between FSUIPC and MSFS.
If you need more information, please let me know!
Best regards,
Frank