When I save my profile with damian@bitcoin.rocks, nostr automatically adds a .com at the end. Am i doing something wrong? Should I try on desktop? 

 Yah I would try a different client. What client are you using? 

 it shows up on Primal but not Damus 

 Ah, it's a known bug on Damus right now that it doesn't update. Should be fixed in the next version.