Windows 11 is getting multiple monitor refresh rate improvements

X is legacy software that just needs to die.

And don't even get me started on the window and compositing manager with the same name.

I switched to Wayland and everything has been working smoothly.

Using x is the problem here

Xorg works fine with VRR on a single display although no one should use Xorg, it's legacy software and no longer in development.

Wayland VRR works out of the box with most popular DEs like KDE or Gnome.

HDR can be added to gamescope, but be aware it's still considered experimental.

AMD experience was nothing but flawless, only Nvidia was buggy due to their drivers, but they're preparing Wayland support soon.

I'd just like to interject for a moment. What you're refering to as Linux, is in fact, GNU/Linux, or as I've recently taken to calling it, GNU plus Linux. Linux is not an operating system unto itself, but rather another free component of a fully functioning GNU system made useful by the GNU corelibs, shell utilities and vital system components comprising a full OS as defined by POSIX.

Many computer users run a modified version of the GNU system every day, without realizing it. Through a peculiar turn of events, the version of GNU which is widely used today is often called Linux, and many of its users are not aware that it is basically the GNU system, developed by the GNU Project.

There really is a Linux, and these people are using it, but it is just a part of the system they use. Linux is the kernel: the program in the system that allocates the machine's resources to the other programs that you run. The kernel is an essential part of an operating system, but useless by itself; it can only function in the context of a complete operating system. Linux is normally used in combination with the GNU operating system: the whole system is basically GNU with Linux added, or GNU/Linux. All the so-called Linux distributions are really distributions of GNU/Linux!

Linux is an open source operating system based on UNIX. There are multiple different distributions (different versions developed by different people) which offer varying benefits. All distributions offer much more customization than windows, and some distributions have a similar GUI (graphical user interface) to windows, making the user experience very similar.

One of the biggest advantages to Linux is that Windows tracks user data, so users who care about privacy usually choose Linux.

Not much can be done about that. If you're not hitting a vertical blanking interval compatibility issue, you're likely hitting a bandwidth constraint requiring maximum mclk at idle to sustain those displays.

With that said, the idle power improvements have hit various display configurations, including many dual monitor setups.