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PiGallery 2
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PiGallery seems to support your requirements
Photoview may fit your needs, minus the no registration bit
i think the new kid in the playsand is : https://github.com/immich-app/immich
I was suggested ncphotos and so far it has been amazing and very simple to setup, you will however have to use Nextcloud and log in which doesn’t meet some of your requirements, through some configuration it can do face recognition and preview generation however.