Lost photos!

I wouldn’t assume they’re gone yet, but I’d avoid deleting, resetting, signing out of iCloud, or restoring anything until you’re sure you have a current backup of what’s still on the iPhone.

Since the hidden photos from that same time period are still there, I’d check whether the missing items are in another library/account or were removed from the main library but not from Hidden.

A few low-risk things to check first:

Open Photos and go to Collections > Recently Saved and also search by month/year, like December 2023 or 2024.

Check Settings > [your name] > iCloud > Photos and see whether Sync this iPhone is on or off. Also check whether you’re signed in with the same Apple Account you used during 2023–2025.

Go to iCloud.com/photos from a browser and check there too, including Recently Deleted.

Also, did you ever make an encrypted backup to a Mac or PC before the photos disappeared? If so, don’t overwrite it. That may be the best place to recover them from.

Apple’s recovery checklist is here: If you're missing photos or videos in the Photos app - Apple Support

I’d start with those checks before trying any restore, because restoring the wrong backup can replace what’s currently on the phone.

Du bist hier in einem deutschsprachigen Forum, also poste bitte auf Deutsch oder nutze den Übersetzungsdienst oder einen externen Übersetzer (Google, Deepl).

Falls du es vorziehst, auf Englisch zu posten, steht dir 24/7 das US-Forum unter Official Apple Support Communityzur Verfügung.

Derartige Datenverluste sind sehr häufig mit Speichermangel (lokal, iCloud) assoziiert. Da bei dir nur das kostenlose Kontingent zu Verfügung stand und dieses aufgebraucht ist, dürfte hier die Ursache liegen.

Wenn die Fotos nicht an Orten wie „zuletzt gelöscht“ zu finden sind und kein lokales Backup vorliegt, dürfte der Datenverlust irreparabel sein.

Thanks for posting your question in the Apple Support Communities. We have a Community for English speakers here: Official Apple Support Community

Please feel free to join and post your question there, or repost your question in German here: Offizielle Apple Support Community

Have a nice day!