Hello, we have a 3.5 cm high landing in one of the rooms, our Roborock S6 does not manage this landing, or for it this is a natural barrier (which in our case is perfect for this room). Generally, the Roborock doesn't like height differences too much, we have partly laid different floors (room - corridor) with slightly different heights, so it sometimes struggles a bit.
With a ramp or something similar I could imagine that it could work.
Greetings, Fredy