They are independent of the touch bar. It simply presents a UI for any external ...

		shadowfacts on Sept 1, 2020 \| parent \| context \| favorite \| on: Lunar – macOS utility to set brightness and volume... They are independent of the touch bar. It simply presents a UI for any external monitors for which macOS already knows to control the brightness. You can change the brightness of supported monitors from System Preferences or using the keys on compatible keyboards.