Is there a way I can find out where my region is hosted?

You can find out where your region is hosted by using the following command:

platform api:curl regions | jq '.regions[] | select(.available != false) | .id + ": " + .provider.name + " - " + .zone + " - " + .timezone' | sort

The returned list contains, for each region, its name, provider, geographic zone and its timezone.

For more information on this feature, please see the following page in the Upsun documentation:

https://docs.platform.sh/development/regions.html