FWIW I haven't seen this in recent months. TBH I've lost track of most of the context.
(In reply to Wayne Mery (:wsmwk) from comment #5)
Progress was made in Bug 1869374 - let passkey support on macOS ride the trains - linked to Bug 1792433,
(In reply to Matt from comment #6)
Should there be user documentation? Who does that? Is it Roland?
Not sure what doc we'd want. FWIW the Mac documentation link has changed. I think the current equivalent would be https://support.apple.com/guide/passwords/passkeys-mchl4af65d1a/mac