Complicating the matter is Austin is young so may not have had the funds to outfit himself as someone older would. One example is the lack of a satellite device like a Garmin InReach Mini. They are $400 plus a monthly subscription. For those who don't know, aside from the SOS and text messaging features, they have tracking capabilities. Every ten minutes your position is sent via satellite, and people with access to your map share can watch your movement throughout the day on a map. At the very least it gives the last known position to start searching, even if the user is unable to issue an SOS.
Even spending $4 for a month-long subscription to AllTrails would have been helpful. While there's valid criticism that hikers can overly rely on GPS apps, in Austin's case having the app for backup would have given him a warning that he was off-trail and aided him in returning to the standard route.