Hey – NDK does support NIP-46 remote signing and Outbox.

Oh nice. Now I am trying to play with the NDKNip46Signer but I am not sure about this: if I want to sign in using the nip05 or npub string, does the remote user need to have advertised the relays in which it will "listen" for bunker connections? I am thinking about the scenario where I want to login on a desktop web page while I have Amber on mobile to sign requests. At least with nostrudel you have the whole bunker url with hex pubkey and the relay you want to use, and I am not sure how this translate in NDK.

Do you mean the well-known stuff with the nip46 relay urls inside?

NDK does support NIP-46 but I don't know if it supports generating the nostrconnect:// url. I think it expects the connection to be started on the signers side with the bunker:// url