Hey Vitor, rbr.bio already does it, check out https://rbr.bio/npub1gcxzte5zlkncx26j68ez60fzkvtkm9e0vrwdcvsjakxf9mu9qewqlfnj5z . I wrote to you DM some time ago about it, but you didn't write back.
Discussion
But rbr is just for contacts, right? We need a relay type that anyone can spin up and find any event in the ecosystem.