Its a different risk.

The cornershop does not have access to your friend graph. Also, if you pay by card, digital ID only provides corroboration, your payment acts as a much more traceable indicator.

The risk of "digital ID" is that it'll leak grosly disprocotionate amounts of data on the holder.

For Age verification, you only need a binary old enough flag, from a system that verifies the holder's ID.

The problem is, people like google and other adtech want to be the people that provide those checks, so they can tie your every action to a profile with a 1:1 link. Then combine it to card transactions to get an ad impression to purchase signal much clearer.

The risk here is much less from government but private companies.