So power went out for a few days last week during the storm. We are in a rental house right now so not familiar with the electrical set up here.

Several GFCI breakers tripped, found the one in the kitchen and got that working for the counter outlets. But the master bath and spare bath outlets still aren't working, and I can find the damn GFCI reset to those the life of me. Landlord is worthless so looking for any tips of how to go about finding that? Or is it just keep looking for every outlet in the house? Would assume it would be nearby by don't see it anywhere? TIA.

When was it built?

Newer houses will run all the bathrooms on a single circuit so they only have to install one gfci. Generally, it will be in the bathroom closest to the panel.

Semiolder {90ils ish) homes might have it in the garage or somewhere else random.

Old houses could be somewhere random, depends on who retrofitted it. Usually on old houses they are just at all the points of use.

Look under the hand towels.

If it has the obligatory big ass tub, there is a gfci for it. It should not be tied to other stuff, but worth a look. The gfci for it would likely be in the master closet. This is most likely not the solution, but easy to check.

Mine is in the closet for some reason so check there

Had this happen in my duplex. The GFCI outlet was on the back porch that controlled the Bath and Master vanity area. Makes total sense.

Guess OP is still shaving in the dark.