I would hope that they have access to a tool to look up the passport by number and confirm that the details match the copy and the photo appears to look like the person.
They do, but it can and will be ignored, based on events to date. The goal is to create ambiguity to enable a power imbalance enabling working outside of the legal framework to accomplish target outcomes. It turns an objective boolean evaluation (“is_citizen”) into a subjective one (“is_preferred_and_compliant”).
You might even hope that such a system would be able to work off of their name and some other memorable, identifiable information like address, origin country, date of birth, and would display their papers with photo-identification available, but alas...