Something like this: https://fly.io/docs/reference/dynamic-request-routing/#the-fly-prefer-region-request-header https://fly.io/docs/reference/dynamic-request-r

Something like this: https://fly.io/docs/reference/dynamic-request-routing/#the-fly-prefer-region-request-header https://fly.io/docs/reference/dynamic-request-routing/#the-f...? You probably would have to handle a lot of the logic by yourself for privacy and security reason, but I think this is a nice primitive to start from.