Lacking a proper trim kit you may be able to strap the microwave in place securely from side to side using metal straps like plumbers tape or nylon straps.
Can you put vinyl strap in microwave.
If this is your idea to get the tape more sticky then you stop and get some different better tape for whatever your are trying to do.
Is more complicated.
If you have tape that you think you need to microw.
As you surmised the answer does vary according to which.
Watch the record as it melts in the microwave and turn off the microwave when the record melts down the outer or inner sides of the bowl depending on how you have the bowl turned.
I would assume that the process of the microwave would damage the vinyl.
I have put vinyl on charger plates and plastic tumblers which don t go in the microwave and as a gift i add a slip of paper with washing instructions no one has given the gift back lol.
Trim kits usually have vents below and above the front of the microwave to allow for ventilation.
Ba dum tish the answer to that question can you microwave rubber.
Then you can fit wood trim around the front for a clean look.
Pressure sensitive adhesives aka self stick adhesives that don t require solvents or heat to activate the adhesive shouldn t be used in the oven or microwave for a couple of reasons when heated at high temperatures the adhesive can melt and give off an odor.
Turn the microwave onto the regular cooking setting and set the timer for 10 minutes.
First let me say that there is no reason to ever micro tape.