This article explains how to move apps from the App Library to the home screen on your iPhone, including how to find an app with Spotlight and then add it to your home screen.

On ‌iPad‌, Apple adds an App Library icon to the dock that displays the last four hidden apps you used, and tapping on the icon opens the App Library.

Apps often clog up the Library section of the Microsoft Store on your computer but using this method you may hide or remove useless apps.