I may have tried the demo at some point (along with other Self-hosted solutions for photo backup), but Synology Photos does what I want without any real setup.

For search, I use a paid software called Excire Foto (German origin) that uses local-AI. I point it to my network folder, and it creates its own database away from my originals. Expensive software, but it’s been worth it. Synology photos also has searching by subject, but Excire is far more contextual and easily beats out anything that Google Photos offered.