This GDPR thing does not even worked for me!!!.I tried every method on the above post but still didn't get my desired result(As in nothing happens!).I tried the games that made by the other developers with GDPR compliance on this discussion like sachos345 game,click the user consent and it work.(show the pop up).
It will be better if they have a proper tutorial on this and for the admob part also.I mean I have tons of question like "Do I need to publish the app first on the playstore(linking the admob)?."
The only solution I can come up is to not publish the app on the countries affected by this GDPR comliance.