Ad Manager Ads Not Showing

Dear AB Team I have been telling you all for the last 1 month that Ad Manager ads are not showing in my app, neither real ads are showing, nor test ads are showing, even though my app is available on Play Store.

Only after facing a lot of problems, I have received the account of Ad Manager but I am not seeing any response from you guys.

I request you all to solve my problem
Thank you

Note: I cannot share my app publicly.

You must share aia and published App LINK with any of mods