Google My Business is testing a new feature in the knowledge panel for businesses to show an area served by the business.  This could be related to businesses that serve an area larger than a city or town.

Here is what it looks like on desktop:

And on mobile.

When you look at the area shown on the map, you can see that it is a larger service area than most businesses.  So this could be a reason why Google has chosen to show the map here.

This could help businesses that serve a larger service area than one might think.  So if customers see they are included in the coverage area, they might consider using the business.

I was able to replicate this across browser sessions.

H/T Sergey Alakov.