Ultimately this Post was applicable to my situation:
, where the Add-On was calibrated after an already calibrated Quadrant. Deleting the Calibration information after the Driver was removed as instructed in this post and re-installation and calibration resolved the issue.
It seems that with the current Firmware, the Flaps do not require a separate calibration step except for in-application calibration like in the Fenix and MSFS separately.