Nostr doesn't save photos, just links. So it depends completely on where you upload them.

nostr.build deletes all meta data (at least they say so 😅), so you might want to use that one.

Alternatively you can remove meta yourself, e.g. with a tool like ScrambledEXIF (Android)

I've read that if you post to nostr.build (used on Amethyst) it strips out all of the metadata.