Here a re a few ideas for Garmin to consider that would work with touch (and some I know from other watch platforms such as Wear OS):
-) double tap screen to zoom in temporarily for a few seconds (helpful if you have poor eyesight)
-) right and left swipe on the watchface screen to go to other screens: such as the activity screen
-) long press watchface screen to select watchface
feel free to add other features that are touch screen related.