A real "new owner" issue is checking the car with the app often, which keeps the car awake. I think I did that about a million times a day when I first got the car.
When you check on the car via the app, can you see if the doors are left open overnight?
You should confirm the climate control is off. The PPF people might be turning it on while they work.
I would turn the cabin overheat off, sounds like you don't need it now. You can always turn it back on when you determine what's going on.
If you have FSD, check to see if you have the summons function in "standby". If so, disable the standby.
I went through the same phantom anxiety. I got a hold of TeslaFi (free for 2 weeks) and was able to see what was going on with the car over the course of each day. I wound up determining that my phantom drain was about 1-2% per day. Parked in unheated/unenclosed carport, temps between 30 and 60.
I would wait until the car gets back to you before getting concerned. Good luck.