How about that notch on the iPhone X, XS, MX Max, or XR? Some people don’t mind it; others do. Either way, you can’t hide it or obscure it in an app, but you can camouflage it on the home or lock screen with the right wallpaper.
You may be able to find built-in wallpaper or images of your own that can conceal it, or you can download the 99-cent Notch Remover app to modify any image you choose so you don’t see the notch. Open the app and tap the first button at the bottom to access your Photos library. Select the image you want to use. Move the slider at the bottom to adjust the corners between rounded and straight. Tap the second button to save your image to your photo library.
Now you can exit the app and return to the Wallpaper screen under Settings or to your Photos app to select the cropped image as your new wallpaper.