I don't think there are many 3+ highway interchanges. These interchanges are designed to go in places where highways intersect. And you wouldn't design highways

I don't think there are many 3+ highway interchanges. These interchanges are designed to go in places where highways intersect. And you wouldn't design highways so that more than 2 highways intersect in a single point. If you need to connect 3 highways in a certain location, you can just pull back one of the connections and make 2 separate interchanges instead of one massive one. Apparently no other country makes local stores directly accessible from the highway so 5 layer interchanges just don't exist anywhere else. This is why Texas interchanges are the highest, because they're the only interchanges in the world with 5 layers.