Just type the command and send it. You won’t see it in the list of suggested commands as your typing it but it works. You’ll get a confirmation message back after you send it
Discussion
Looks like the command is /nostr add [npub]
Yes. Sorry I thought that was already specified but absolutely correct. Don’t forget the word add and don’t put brackets around the npub. Probably obvious to you but I’ve been asked that multiple times so just for anyone else who comes across this 😂🤙