Given the typical design upgrade cycle it's a good probability it will just take upgrading the hardware, maybe some minor BCM config changes.
The Gen5 DT platform hasn't undergone a major revamp which usually changes wiring and communication. That probably won't happen till the '24 or '25 model year.
They are working on in different forum. I think some of people doing are on this site as well.
One person, has it sort of working, but still having issues, last time he posted.
It's costly though. and U5 has a ton of issues.
Another reason you are likely not seeing too many people do it. Lack of parts.
I ordered 2022 Rebel GT parts to try putting them on my 2021 non-GT Rebel.
Been waiting months.