Options:

1. Very Wet paper towel on the plate, microwave the plate for 30s
2. Heat it up over a flame, a ways away (ie. Butane torch under it, but like 12" away)
3. If you have a small countertop over or air fryer/toaster. Heat it up in there briefly
4. If you’re making toast, place it on top of the toaster (not too long, it can still break).

I heat my plates up alllll the time.