Adaptive refresh rate
An adaptive refresh rate lets a display vary how often it updates, within a supported range. Variable refresh rate (VRR) can align updates with arriving frames instead of always using one fixed rate. ProMotion is Apple's name for its adaptive display technology.
A displayed range describes the available refresh rates. It does not mean that every frame is presented at the maximum rate. The content, Mac, display and connection all matter. This is separate from the frame rate at which a stream is captured.
See Refresh rate for how display updates differ from captured frames. BetterDisplay identifies available variable modes in Refresh Rate. Apple's refresh-rate guidance explains adaptive choices on supported Apple displays.