I'm not sure if it is possible, but for the iPhone Xs would it be possible before deciding to show a notification to use the TrueDepth camera to take a quick pe

I'm not sure if it is possible, but for the iPhone Xs would it be possible before deciding to show a notification to use the TrueDepth camera to take a quick peek to see if a user's hand is near the top of the screen and delay the notification until the area is clear?