My new favorite thing: I turned on Voice Control on my iPad and added a shortcut command which toggles the volume when I say “mute”. Super handy for muting commercials while watching March Madness, and just does what it says with no Ui other than the word “Mute” appearing briefly.
You can do something similar with Siri, but the Siri UI is slower and more intrusive, and it sticks around so then you have to say “Hey Siri go away”.