Sync is not a no go rather something I dont mind if not present.
The phone I want this for is on A11 and my work phone. I dontfknow if I am missing to enable folder level permissions for apps but many apps Iave doseea all pictures or videos have.
The most isolation IhVave seen is use files within signal or telegram and those dont show up unless I save to gallery.
Seems nice but has no folder or organisational feature. Seems its just a large dump of photos.