Is there a flavor of Linux that is formally supported ?

A few years ago I was able to get the SDK to work on Fedora 27. I had to find some old libraries and make them available.

I want to do some work with ConnectIQ again and would like to use whatever Linux flavor is formally supported. A while back I thought I was told that Ubuntu LTS releases are supported. I think Ubuntu is up to version 20 now.

Is there a flavor of Linux that is formally supported?

Thanks