Photoprism is good. Have you upgraded to NC 25 and photos 2.0? It is a massive improvement, and you can use Recognize app for auto tagging your photos using facial and other object recognition.
Hetzner offers a managed product -I'm still on version 24.0.5. The users aren't given the possibility to upgrade or configure the product. For example, I'm not able to turn on the option to create the photo thumbnails.