Xiaomi Robot Vacuum S20+ not cleaning tiles

I recently purchased a Xiaomi Robot Vacuum S20+, and after using it for a week I noticed that it does not mop the tiles properly. I still have to go over the floor with another mop to get the tiles clean.

I returned the unit and it was replaced, but the new device has the same problem. It still does not clean the tiles effectively, and I cannot adjust the mopping speed to make it move slower for a better clean.

I would appreciate assistance in resolving this issue.