Your suggestions, while they might have merit as a separate feature request, really are not focused on "Encrypt Bitwarden vault with Master Password/PIN + security key ", so they do not belong on that request.
As @Nail1684 stated, please limit any feature request to one topic. That includes both creating requests and keeping the discussion somewhat on topic.
Regarding #1 and #4, you might check out Quantum Resistant Encryption and maybe throw a vote or comment it’s way.
Regarding #3, you might check out
Sign into Bitwarden with a passkey / "Login with passkeys" and consider voting for it or adding a comment to it that furthers the discussion.
And, for #5, take a look at Making Password Management Truly Intelligent (using AI and automation features)