Kiltreiser's page

It's the same with the envoy and their class insight bonus.

Nope, check the text for Expertise on the Envoy. The Expertise dice you add to a selected skill is an Insight bonus. Skill Focus is an Insight bonus. But the text clearly states you can apply both.

"Beginning at 9th level, you have even greater expertise with
skills to which you can add your expertise die that you have also
selected with the Skill Focus feat." (p.61)

180. Android Mechanic whose tinkering results in its soul getting trapped in the body of its drone and vice versa.