sorry, but first time ever I am not agreeing with you.
No matter how I try, which account I am using...
1. Free Private Google Account
2. Google Workspace account with own Domain
3. Google One account
it just say every single time it does not fit the Auth 2.0 security standards and is rejected.
If we all are making a mistake somewhare, it means, that the documentation of this integration is not correctly written, because I am folowing yout step by step configuration and it is rejected.
I gave you an access to each of mine accounts to check it yourself....why didn't you check it? Insteed you are forcing your argumentation, that everything is working fine and you checked on your account....
With all the respect please check it with one of mine accounts and you will see the problem...
thanks