Unable to sign in to a Google account using a saved passkey

I'm using Firefox and adding the passkey to my Google account seemed to work fine, but when trying to log in, the prompt still behaved exactly like before I added the passkey, and there was no sign of an option for signing in using the passkey.

I tried adding a security key instead as suggested, and 1Password popped up asking if I wanted to update an existing key or create a new one. I chose to update, but when I'm then supposed to give the key a name in the Google account, I only got an error message from Google saying something went wrong, and to try again. But if I exit out of the security key wizard, it has added another passkey to the account anyway...

So adding a passkey through the correct option in the security settings for the Google account works when adding the key, but not for logging in, and it doesn't matter if I choose Use another device or Continue in the create key wizard. Conversely, if I try to add a passkey by choosing the option Security key, the wizard fails when I try to give the key a name, but the key is still added as a passkey and I can use it, but only as an MFA method, as I still need to enter my password first (I have the option checked under security settings for skipping the password when possible).

I sure like the concept of passkeys, but It's evident that we're in the early days, as right now they're only causing me issues that regular passwords don't, but hopefully it will get better with time.