It isn’t exactly new, but using voice control takes an adjustment in workflow and habit. Michael Potuck has a good step-by-step on Voice Control in macOS Catalina.
Voice Control offers number overlays and grid overlays along with built-in and custom commands to control your Mac entirely by voice… Offering impressive improvements over the previous dictation abilities in Mojave, Voice Control leverages the Siri speech-recognition engine and on-device processing for a great experience
Good tutorial. Worthy read. I have a few dozen Siri Shortcuts on iPhone and iPad, but I have difficulty getting them into a workflow.