That may be the case - but I just tested it again on eBay and I still can’t login on my desktop browser with a passkey from my Bitwarden vault – as I wrote before, it works well, when the passkey implementation is done well on the side of the services… with eBay, it isn’t done well. You can read more about that particular problem here: Passkey popup doesn't show - domain not on excluded domains list
PS: And as written in the other thread: if you want to experiment with passkeys, e.g. use the Community Forum passkey implementation here. (and especially avoid eBay and non-personal Microsoft accounts…)