If you’re wanting to learn how to add a Sun and Sky Setup into your Level, then in the next 5mins you’ll learn how you’d go about it & also how to bring up the sunlight gizmo to easily control the sun position (aka Time Of Day).
https://dev.epicgames.com/community/learning/tutorials/KJdr/unreal-engine-5-how-to-add-sky-sun-setup-5mins