When a firmware update is available for your Pro Display XDR, you might be prompted to restart to apply the update. Otherwise, the update is applied the next time you disconnect and reconnect your display from power or your computer.
Display Firmware 2.2.2
Check your firmware version
To check the firmware version of your Pro Display XDR, choose Apple menu > About This Mac, click System Report, then click Graphics/Displays. In the Pro Display XDR section, the firmware version is listed next to Display Firmware Version.