Turning it back on (not arming on the ground!) in flight, assuming the ATS mode display is blank, is a case of selecting a valid thrust limit and pressing the ATS button.
Will check
But even in unrestricted this aircraft +5200 doesn't show up in the TBM and if unrestricted is +-10000, it should
Again an screenshot taken from Garmin Pilot in the iPad.
If I choose TCAS in Traffic Global the ai traffic shows on the Map in the TBM, but not in the TCAS.
Attached to pictures
TCAS of the TBM and Garmin Pilot on iPad which is connected to X-plane