iOS safari - check if permission granted for device motion

On iOS Safari, we must request permission to access device motion data as follows:

if (typeof DeviceMotionEvent.requestPermission === 'function') {
  DeviceMotionEvent.requestPermission()
    .then(permissionState => {
      if (permissionState === 'granted') {
        window.addEventListener('devicemotion', () => {});
      }
    })
    .catch(console.error)
  ;
} else {
  // Device is not iOS 13+, no permission requests are neccessary
}

This code must run following a click interaction. Because of this, I am displaying a button, that, when clicked, runs the above code to request permissions.

However, chances are the permission is already granted from when the user previously used my app, and so I would like to avoid showing this button.

How can I check if permission already granted?

from iOS safari - check if permission granted for device motion