Can you self-connect in DUB between two Ryanair flights on separate bookings without having to go through immigration/security? No checked bags, obviously.

I remember a long walk between Ryanair gates and immigration, but don't remember if there were separate levels for arrivals/departures, or you simply got dumped into the secure non-Schengen area on arrival from where you could immediately board another flight.

The airport website mentions you can only self-connect if both flights are on the same booking, but I fail to see what difference it would make. A boarding pass is a boarding pass, how are they going to check if I arrived on the same booking as the one I am going to depart on?