trouble with google photos app and should I switch to something else?

Phone is Moto G Stylus with Android 13. Whenever I launch the built in photos app, it now gives me a nag screen to download a version upgrade. When I click "upgrade", nothing happens. It's conceivable that I have network permission disabled for the app. I better check.

1. Is this a familiar thing? How do I make it stop, either by installing the upgrade or by shutting off the nag screen?

2. Is there a FOSS photo viewer that anyone recommends instead, that I can install from F-droid? I'm reasonably satisfied with the UI of the Google one. It allows sharing photos, moving them into subfolders, seeing the metadata, and some minor editing, all of which are useful. I don't care in the slightest about cloud sync or google drive so it's ok if the replacement app doesn't have those.

Thanks!