In the description of the product with EU cylinder I see "........1 Adapter for Dormakaba/Kaba (yellow) included in delivery. Other adapters can be ordered separately" Since the CH cylinder is presumably a Dormakaba/Kaba, the yellow adapter can be securely placed on the axis of the rotary knob and the Smart Lock can be used in this way.

So the device I have is built in such a way that a key is inserted on the inside of the door and the device turns the key. So it has a narrow slot in the nuki housing, suitable for a key. A door knob should have a corresponding counterpart... on the nuki homepage there is an installation check... also for knob solutions... you have to specify the knob manufacturer. Have a look there. An adapter plate is attached to the door itself... and this is accordingly for ch or eu lock... I think you should order the ch variant. Because whether it's a knob or a key, the lock is certainly a ch lock by type, and you need the ch adapter plate... I think.