Digital ID is already here, it's just that most people tend to associate it with phones and computers. Where did your current driving license come from? A computer. All the data on it is linked to a database somewhere that is aggregated together into a national ID system. Every American, Canadian, and Mexican is aggregated into one database. Its for your safety!
All that is really left is to have it on your phone and many states are already doing, and to bring up a QR code for enabling it to be used for scanning. Though thats already besides the point as it can already be scanned by machines.
Digital ID snuck in like a thief in the night and the average citizen was unaware the entire time because they named it something boring and trite like "Real ID." It also, effectively breaks search terms.