Those links only work within Nostr, though. Unless I'm mistaken.

njump - the nostr static gateway

njump is a fast, lightweight HTTP gateway for browsing Nostr profiles, notes, and relays. Share Nostr content anywhere with rich previews, embeddab...

On amethyst when I copy/paste a link to a note, it uses njump. I text the link to my non-yet on nostr contacts and they can easily view the note without an npub