Ad Manager does not show ads

I have an app with ad manager banner and interstitial. The test mode is unchecked in both. When I publish my APK , no ads are shown. Does anyone why Ada are not shown???
I have app-ads.txt published and my ad manager account does not give any error.

When I check the ads with test mode in companion, these are shown perfectly.

Same things happen to me, in test mode ads were shown perfectly but after publishing on play Store no any ads are visible. My account is approved also.

This may probably be due to a low ad fill rate. But I donĀ“t know sure.

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