Passkeys are unique cert pairs for each site. The site gets the public key, you keep the private to login under your account. The site never stores your private key.
To store them simply, turn off your browsers password/passkey storage. Store them in your password manager along with other sites passwords.
Yup. “Bumblefucks DVD emporium” will oddly have 100k to splash out on lawyers to sue in that one Texas federal court with a Trump judge that refuses to abide by random cases being distributed, and this will be on hold for the whole country. The supreme courts shadow docjet will then affirm it with no comment, and then we wait for it to reach them, where they will release an opinion on the last day saying it’s illegal, and also so is the FTC, and also senators are kings like presidents.