In case anyone else is interested, I’ve put together a map of fly regions including edge only regions (regions where you can’t put VMs). This information has been put together with whatever is available publicly and may not be completely accurate.
Edges are not listed on the regions page (I did ask but so far it hasn’t been updated). I did find a list which I assume is correct as we have received traffic from the MEL edge in our apps. It’s used for map in Grafana.