Scenes not working in Layout 2020

Hi, im having issues with my saved scenes in Layout.
The same scene shows in all viewports.

I see that its recommended to use the
Skp model inspector window and look to see if the Camera, Effects, Style, and/or Tags sections have a grey background and a Reset button. And to remove all the LayOut viewport overrides.

Where do i find the skp model inspector window?
And how do i remove all the Layout viewport overrides?