No data for this time period from unity

hello , I just made a dikular application, and put up unity ads. on the unity ads account, a warning like this appears: No data for this time period
There is no data for the time period selected to show the chart. It’s possible that your Unity Analytics integration is configured incorrectly, or that your game is still in development and has limited data available.

When I run the app on Android, the unity ad still shows. Is the ad that appears is my ad or how?

please explain, thank you

if you recently integrated unity to your app then it is normal as it will show the data when a threshold data is collected for example it will show after at least 50-60 ads request or after 24 hrs of integration, but if you face the issues for long time then recheck the integration or contact unity