I am running the latest beta of 1password8 and 1password for safari, but I have had the issue for week.
https://auth.tesla.com/oauth2/v1/authorize?redirect_uri=https://www.tesla.com/teslaaccount/owner-xp/auth/callback&response_type=code&client_id=ownership&scope=offline_access openid ou_code email&audience=https://ownership.tesla.com/&locale=en-US
In the passcode box there is no 1password button and from the 1password browser menu auto fill does not do anything.
I tried to include the page source but it was too many characters for this box.
1Password Version: 8.8.0-126.BETA
Extension Version: 2.3.5
OS Version: MacOS 12.4