

You can have VRR when connecting to an external DISPLAYPORT (not hdmi) monitor. The internal panel is 60hz (or 90 on the OLED). You can adjust the refresh rate to any fixed value down to 40hz, but this doesn’t happen dynamically.
With fixed frame rate you have the fundamental problem that any time the GPU takes even one clock cycle too long to finish a render, you drop to 1/2 framerate. With fixed frame rate you can’t miss by just a little bit, every miss is rounded up to the next full frame.
Try searching for any game, any game at all. Steam can’t do it.