The HDR option that's been taken away and now given back to us. Isn't controlled by Apple itself. It's YouTube. That's why people can use the workaround that changes the user agent to make Google allow HDR even when it's disabled by YouTube for Apple devices..Now, I had not updated to Monterey 12.1, so doing that now. I just didn’t think Apple would allow the system to offer a Safari update that brings back HDR before the actual macOS had been updated to fix the issue, thus allowing the system to crash.
Since the 12.1 release where it fixes the HDR bug. Apple prob contacted google and removed the HDR limitations so that others can now use it again. Since remember. This YouTube HDR is not only disabled on the new MBPs. But all Apple devices (Macs)