I got my 7a referbished for 350. the nothing phone is cool IMO but probably not going to have good support rn for nieche stuff. lineage & divest not having working versions for the phone raises red flags personaly.
if you are anti pixel & $500 is in your price range maybe take a look at the fairphone 4?
you can use something like smspool.net to verify the account with a one time use #. then google will allow you to link an authenticator app to the account. removing the # from the account afterwards does not remove the TOTP code either.