I've seen plenty of coffee flavors, but thar's where I live. It's probably different where you live. Cold Stone Creamery, normally has coffee ice cream though.
I went to an ice cream parlor in Merida, Venezuela that is world-renowned for creating bizarre ice cream flavors.
To this day, I still remember the spaghetti flavored and beer flavored ice cream.
Apparently they are continually upping their game, and have Trout, mushrooms in wine, hot dog flavored ice cream. Sounds delicious!
https://www.atlasobscura.com/places/coromoto-ice-cream-shop