It is on amethyst and coracle.
Discussion
on coracle i see you have the option to use it but it won’t work for me
You need to setup an inbox relay, on coracle see relays, there will be an option for read/write/inbox
Any relay could be an inbox relay, but non-specialized ones will leak the fact that you got a DM (not from whom, but just that you got it)
Specialized relays leak nothing (inbox.nostr.wine) is one, but its paid.
also gossip, 0xchat, coop