I am thwarted all the time by having many passkeys enrolled in the password manager, all named “passkey”, because the website kept prompting me to make more whenever i logged in. Yet the website still prompts me to “input your security key”, ignoring all the saved passkeys.
Nobody is (should be) stopping you from enrolling all your devices, and synced passkeys (e.g. iCloud Keyring) are part of the spec.
I am thwarted all the time by having many passkeys enrolled in the password manager, all named “passkey”, because the website kept prompting me to make more whenever i logged in. Yet the website still prompts me to “input your security key”, ignoring all the saved passkeys.