Those are Nip04 DMs, we are using nip 17 which is much stronger.
Discussion
Can I ask if there are any nip17 complaint clients for iPhone?
YakiHonne, Nostur, 0xChat, Flotilla, Coracle, Chachi, pretty much all of them but Damus and Primal.
We’re even building it into nostr:npub1xxdd8eusvdxmaph3fkuu9x2mymhrcc3ghe2l38zv0l4f4nqp659qskkt7a.