Ad manager and export not working

What do we do after removing admob blocks permanently?
We created an account on Ads Manager and linked the application ID to it
The components have been replaced, but unfortunately, ads only appear in the test and when building the application is not completed
There is no full practical explanation of advertisements via video
All replies and explanations are vague

There are Facebook Ads, for WHAT?

We cant use it as it requires bidding, so why was Kodular had yet not removed in the 1st place.