How are people able to just spin up Google login using these libs? When I tried it doing it directly my site had to be reviewed multiple times by some Google re

How are people able to just spin up Google login using these libs? When I tried it doing it directly my site had to be reviewed multiple times by some Google rep and I had to change the privacy policy, not have any beta features etc etc. What am I missing? I find it really strange that I must fully launch my product before I can enable the most common login mechanic. It feels like a catch 22.