This is also why I won't buy any watch with a microphone

Even if the manufacturer doesn't do something evil, they may have an exploit or allow 3rd party apps that do whatever

Garmin literally keeps the microphone on 24/7 listening for "OKAY GARMIN"

There should be a consumer law that any device with a microphone must have an LED physically in series so that if the mic has power, the LED is lit, not software control of the LED which can be disabled. Europe might do that someday but unless California does it too it will never happen in USA