S25 screen protectors

The S25 doesn't come with a screen protector in the box? Are you talking about the film you're supposed to peel off? Or one given by a bundle? The last phones that did were the S20 and Note 10 series. It also makes no sense for a screen protector not to work with a fingerprint sensor.

You don't say what type of screen protector you are referring to
But I always re-register my fingerprints when changing screen protectors

Sorry my fault. It was part of a package I bought, so not within the phone. I've found out some protectors are fingerprint compatible and some aren't, but not sure why these days.