Hi beaver,
If you want to gain access to the TPMS sender while leaving the tire on, it is possible, but almost as much work as just removing the tire completely. Marking the tire/rim location will probably keep your existing balance OK for riding again, but if you only break one side of the bead loose, it won't move while the second bead is set on the rim.
To gain enough tire movement at the TPMS side of the bead, you must break the bead all the way around on whatever side you decide to work from. The extra space for working near the TPMS comes from the bead going into the "drop center" on the opposite side of the rim.
You may need to use "C" type clamps to smash the tire, bead to bead, both on the TPMS side and on the side opposite. If your tires have any steel belts/plies, I'd try not to do this...they are flexible for sure, but putting them in a complete kink could result in an unusual condition when you ride...once again, I'd recommend just taking your tire to someone with the proper equipment/tools to remove the tire. You can then work on the bare rim, and let them remount your tire.
Will do, it was just a thought so I could do it myself. Will have to wait until the shops open again