we have them on damus if you ever need that dopamine hit

I don’t believe so, but nostr:npub18m76awca3y37hkvuneavuw6pjj4525fw90necxmadrvjg0sdy6qsngq955 on iPhone or nostr:npub1nz64zngcqm8vj8nhrdkcjpfwn2rcaqysnxec88tqfclp5afrpglsqm0w5y on Android both do.

Simply copy your nsec across to them and you can run them alongside nostr:npub12vkcxr0luzwp8e673v29eqjhrr7p9vqq8asav85swaepclllj09sylpugg

Yes, but some apps have it. I'm actually surprised Primal doesn't as they are the most centralized app on Nostr. Maybe they'll add it at some point.