Run the check
Record the game, scene, frame-rate variation, and VRR state.
Compare the same scene with VRR off if the display supports that control.
Return to the original setting and see whether the flicker returns.
Read the result
Flicker only under fluctuating VRR conditions is a narrower pattern than general flicker.
Limits and next step
Browser refresh estimates cannot expose panel voltage or every VRR transition.
Repeat the check after changing one setting or connection. Keep a record of what changed before deciding whether the device needs service.