Perhaps, but there are a few that do it, such as photoprisim and photostruct.

As somebody that already has an NFS share for their photos, is immich able to use my already existing photo location, or is it another one of those that requires an import process that copies them to its own storage?

So, what, it only lets you upload pics remotely but not view? I do not understand.

I was thinking of trying it out but the huge banner saying not to trust it for anything important makes me hesitate every time.