TypeError: motionMediaQuery.addEventListener is not a function. (In 'motionMediaQuery.addEventListener("change", setReducedMotionPreferences)'

Environment

Device: iPhone (iOS 13.7)
Browser: Chrome (on iOS 13.7, uses WKWebView / Safari engine)

A cross-compatible implementation would be:

if (motionMediaQuery.addEventListener) {
  motionMediaQuery.addEventListener("change", handler);
} else  {
  motionMediaQuery.addListener(handler);
}