has a bug, it's not working for me in my case (android, mobile, kiwi browser), they're aware of this tho, been a good while now so to keep the list short, nosx2 seems enough here
there's many more options, haven't checked tho: https://github.com/nostr-protocol/nips/blob/master/07.md https://nsecbunker.com/
I use that combo and it works. I thought it had something to do with custodialness. Nbd