Ads are working fine in my every account in Kodular and every other builder.
How i did it
Follow these rules and now don 't fill community with unwanted topics
Make your app with more content simply adding some screens and a basic app will not do the job
Try to make it more and more complex because you are getting paid for your work not just empty screen with some text dialogs.
Apps working must be a big long ( Blocks)
Ad unit id must be 1 day old.
For content app just download a kodular AIA i am sure your ads will work.
If they not then inbox me
Every developer needs to earn by their hardwork.