The next question is does anyone actually let you import passkeys? I don't think there is ☹️
I have a few keys in Bitwarden but before I go adding more I am going to play with Proton Pass. A lot of users were understandably annoyed when Bitwarden released passkey support but in such a limited manner.
Get a second drive and install Linux on it. You can then flick between the two on boot. I've done this and now booting into Arch more than Windows. I'll still boot into Windows for reasons but Arch is my main OS now.