The Door Access Hub is required for the transition to the electric door lock. The doorbell does the authentication part and informs the hub to trigger the relay. The Mini has fewer "electrical" inputs and outputs and can therefore only operate 1 door independently.

According to our information, this is the current version of the product.

Product can control a Ua-Lock Electric

It is indeed the same product, but it is listed once under the category Burglary Protection + Alarm System, and once under Network Switches. Thank you for pointing this out.