Rudy from Blacksky set up their own copy of Tangled without Tangled guys even knowing about it, so it would look to me like it is self-hostable: https://bsky.app/profile/did:plc:w4xbfzo7kqfes5zb7r6qv3rw/po...

you can selfhost the appview: https://blog.tangled.org/bobbin, which makes all of tangled fully selfhostable now.

It is self-hostable, but Tangled could disclose that great fact a bit more upfront.