i really cannot understand why linux don't have a real gallery app
Why the hell do you need so much "photo manager" if you don't have an app to actually see the "management part" on a proper "timeline" and "album" viewer ?
And before you tell app that show thumbnail of folder (like KDE koko etc), and must enter subfolder manually is not gallery it's basic viewer with preview
i talk proper app like Aves libre (fdroid), but for linux