The target also says: Deployment Info: iOS: 13.0, like the project
Do you mean in your case you have already set it to 13.0 ? And Project is also at 13.0
Did you test your app on iOS 11 or 12 ? Does it work (may be not with all features but without crash) ?
I'm not sure, but the info on Appstore may be computed after code analysis (by XCode), to check that it is compatible with 11.0.
In that case, you cannot influence it, unless to have some API in code that do not exist before 11.0.
See older threads
https://developer.apple.com/forums/thread/68220
https://developer.apple.com/forums/thread/678691
What I do is to explicitly say in the app Description (on Appstore submission) that it best run (or even should run) on iOS 13 or above:
Works on iOS 13 and above.