I agree, but this link worked for me:

https://nitter.meowing.monster/matthew_d_green/status/210827...

It doesn't give any specifics about what changed on the HDMI Forum side, but this article [0] from June indicates that Valve worked closely with AMD to get it pushed through prior to the release of the Steam Machine (which supports HDMI 2.1 VRR).

[0] https://www.digitalfoundry.net/news/2026/06/valves-hdmi-2-1-...

For anyone else that's interested, the researcher's own blog post (linked to in the article) gives a lot more detail: https://zerotistic.blog/posts/find-my-people-linux

I was curious if this used rustpush (https://github.com/OpenBubbles/rustpush) to do the heavy lifting and it looks like Zerotistic referenced rustpush/PyPush/FindMy.py in addition to their own reverse engineering to create their own implementation.