There's plenty of coinjoin coordinators you can discover with Nostr. Check out the coinjoin explorer at https://wasabist.io and the NIP https://github.com/nostr-protocol/nips/pull/384
Discussion
100% I wrote about it here
https://thebitcoinmanual.com/articles/new-coinjoin-coordinators/
3 are dead. 1 has address reuse issues. Ginger is irrelevant.
None of these are decentralized.