UE4 ads not working

The problem is that ads do not want to appear in my game in any way. All required rubrics in the settings are completed correctly, and blueprints are also fine. I looked through all the forums and used all the walkthroughs but still nothing works (Trying to use plugins too). What may be the problem? I’m using Admob.
Informations that may help:

  • My game is 4 days in the store
  • I set up an Admob account yesterday
  • First my project is set up for PC