I moved my Aqara FP2 to a different room and could not find a proper way to fully reset the room mapping.
Deleting zones did not really solve the issue because the FP2 still seemed to remember the old room layout.
What finally worked for me was:
1. Open the Aqara app
2. Go to Detection Mode
3. Temporarily switch to another mode (I used Fall Detection)
4. The app then warned me that the sensor orientation was incorrect and should be mounted horizontally
5. Exit that setup
6. Switch back to normal Presence / Zone Detection mode
After doing this, the FP2 started remapping the room from scratch again without needing a factory reset or re-pairing the sensor.
Hopefully this helps someone else because the reset options in the Aqara app are very unclear.
