As I recall the developer of the Calibre e-book application wanted to do this, but has come to his senses.
If there's legitimate need and enough support, it will be. But I haven't seen any company announcing their fork and services so far. It may not happen on a larger scale.
But Python is not GPL or similarly restrictively licensed, so RH is not obliged to publish the changed code they produce for their paying customers. Whether they will do e. g. via CentOS I have not investigated.
to be fair, all the CVEs I see in the last few years are related to urllib (https://www.cvedetails.com/vulnerability-list/vendor_id-1021...) - there are tons and tons of applications which aren't even using any kind of network communications, does it matter for them that Python gets updated ?
Ah, yes. I meant a different model. RH does support as in backporting required patches and generally making things not stop.
What I thought was implied by a fork was more of a consultancy / paid support like https://railslts.com/