Am new to blender currently am learning from certain youtube tutorials. The problem is in all the youtube videos a shiny ball is seen the viewport of the shading option which is seen in most of the youtube tutorials, Mine is just all dark in loodevmode like that shiny ball is not showing up in the viewport, Whenever add an external hdri it is working But not getting that same result from the yt videos with default hdri. I don't know if the new 2.92 update removed it or not. I tried uninstalling and reinstalling blender but didn't work help me.
Maybe you have enabled Scene World in the Shading options for the Viewport. In this case there is only an HDRI Preview when you actually use an HDRI in your world settings. If you disable Scene World, the Viewport shows a default HDRI. If this option is always there by default when opening a new scene, you have saved it to your startup file. To change it, when you're opening a new default scene, change the viewport option, then go to File > Defaults > Save Startup File.