When I open the default scene in new project and add any object it starts shining that I can’t see anything. If i switch off lightning then it still shines in the dark.
When I create a new scene (indoor, outdoor or empty) there is no such bug. But in the initial scene it still exists if I open it.
Unity 2021.3.21f1
Here is the bug with sun turned on or off:
Here is the same default scene but created manually with editor menu. There is no such bug:
It’s because, in the “new scene” there’s a volume called “sky and fog volume” with an exposure, sky and visual environement override that tell HDRP basically how intense the lighting is and how the exposure of the camera should be configured according to this lighting. In your first screenshots, this volume seems to be disabled.
I suggest reading this and watching the part about exposure and lighting in the videos. That should helps clear some concepts 
