I am unable to recover missing Photos from iPhone's gallery
Hello,
I have a question regarding the pictures and gallery on my phone. A few days ago, on some older pictures and videos (the phone is two years old), an exclamation mark appeared in the lower right corner. The videos couldn't be played. Following the instructions I found on the Apple support page, I changed the setting:
Settings > Photos > iCloud Photos (turned off). Since then, the pictures are not on the phone. Not in any of the folders, such as recently deleted or hidden. I reverted the mentioned setting back, but nothing changed. I had over 13k pictures and videos, now I have just over 1000...
The phone is updated to the latest version, and I have backups.
Is there any way to retrieve them?
Thank you and best regards
[Re-Titled by Moderator]
iPhone 8, iOS 15