pins should be an option in your client of choice. Snort has it, noStrudel has it, not sure about some of the other client. Also not sure if pins are a NIP. If they are then I'd assume it to be NIP-32, a label but that's a guess.
Discussion
What I want is for anyone who visits my profile from any client to see certain pinned notes at the top… hmm. I’ll look at NoStrudels implementation.
Yeah so that would be NIP-51 as pointed out by nostr:npub1zuuajd7u3sx8xu92yav9jwxpr839cs0kc3q6t56vd5u9q033xmhsk6c2uc. If your client doesn't support that NIP then it's not "living the nip standard".