ahh, sorry.. Here would be my recommendations then
Note that when you delete photos/videos they go to a 'Recently Deleted' album where they may be classified as 'other'. Try deleting them from there and see if 'other' storage drops.
You an also check the Files app and see if there is anything in the Recently Deleted area.
If you haven't updated to 13.6, wouldn't be a bad idea if you have the storage space available for the update to download.
If all the Recently Deleted areas are empty, try a force restart
Force restart iPhone - Apple Support
If issue still persists
How to back up your iPhone, iPad, and iPod touch - Apple Support
Restore your iPhone, iPad, or iPod to factory settings - Apple Support
Restore your iPhone, iPad, or iPod touch from a backup - Apple Support