[Distutils] ensurepip in linux distros

Can anyone summarize the state of ensurepip for the major linux distros.

Do any currently include a version that leaves ensurepip intact?
If not, will any? Moreover, would any ever also bootstrap pip for you?

I'm not asking out of interest in wanting it, more to understand for the
sake of editing pip and PyPUG docs.

thanks,
Marcus