Dimensions on my model showing in mirror reflections. How i can change it ?
It is a known issue. E.g. :
https://forums.sketchup.com/t/sketchup-make-2017-mac-os-big-sur-dimension-tool-text-up-side-down/142431/25
I guess there is no proper solution yet, unless you revert back to earlier version than big sur… (I’m not a Mac user so I’m not sure)
Thanks 
Does this affect Layout or just Sketchup?
Only sketchup