I think I found the problem.
Untagged Tag in SU model was solid instead of Default.
After changing it to Default in SU then did the same in LO.
Now I can change the line weight / color of all tags in Viewport.
I missed that change. Leave all of the geometry untagged and leave Untagged set to show Default in both SketchUp and LayOut.
Thanks for your help. This is impressive support!
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Thank you!