The Add widget button cannot be found on the home screen of the phone?

The Add widget button cannot be found on the home screen of the phone?

The widget only supports iOS14 or later, please confirm and upgrade your phone system to iOS14 or later. If you are already on iOS14 or later, first search for " iScreen" in the widget list. If you can't find it, you can try to restart your phone, open the App to add a widget, and go to home screen to find it again.