As of the release of Catalina my macOS screenshot application started having screen image problems. The dispayed images of only the desktop background and none of the folders and other windows on that desktop. I discovered that there was a 'Screen Recording' preference that was needed to allow the app to make a screenshot of all desktop windows I submitted a new verson that displayed the preferences notification https://madshot.net/b5985c32fdaa.png . My app version was rejected for displaying this dialog. More information below. I've seen another dialog that an app can be approved or rejected but don't know how to cause that to be displayed. I'm not sure where to go from here.
I just finished watching an apple video that says your app may display the following dialog which is the dialog that you shared as to be a problem.
Image of video and dialog;
Url of video at the 16:00 minute mark: