In some scenario developers using native platform technologies (like Android/Java & iOS/Objective C) want to include in their apps/games features powered by Unity for 3D/2D Real Time Rendering, AR ...

Open it with Unity 2019.3.0a6 or higher and optionally you can upgrade URP (formely known as LWRP) to the latest. Go to Assets/Measured Materials Library/URP/Sample Scenes/ and open AllMaterialsScene.