This sounds like Chick-fil-A's use case where they decided to put a k8s cluster in each restaurant.
https://medium.com/@cfatechblog/edge-computing-at-chick-fil-...
https://medium.com/@cfatechblog/bare-metal-k8s-clustering-at...
If you have a single node not a cluster in each location then k8s buys you a lot less. Some people still advocate single-node k8s "clusters" for benefits like rolling deployment.