There is no separate status bar window in IOS 13 and this seriously restricts a possibility to control status bar appearance.
Meanwhile Apple added callback functions prefersStatusBarHidden and preferredStatusBarStyle in IOS 7 and they are valid up to now.
These functions allow to show / hide status bar and to specify text color (black / white).
Somehow I posted a sample, which demonstrates different combinations (dark/light status bar without navigation bar; navigation bar without status bar; no status bar and navigation bar) .