e39a ecm. RTT availabilty?

I have searched high and low and very well could have missed this info.
VCM editor V. 4.4.4 using ECM/ECU E39a ( vehicle: 2013 Cadillac ATS 2.0l T RWD AUTO ) has not updated with this option, I have and do see it for other very similar hardware/ software platforms.

Any advice on if this is or not available for this setup and how to go about updating so it is available.

Thank you.

I highly doubt it. RTT hasn't been on any computer since like the P01 which is 20 years old by now.

Not available on this application.

RTT is only on roughly 1% of the applications we actually support so its not the norm and rather RTT is an exception.