There is a mode for several floors, but I can't say what it looks like with regard to the charging stations.
In general, I can only advise against buying this product. It is one of the best hardware, most suction power, best step management, wipe and suck function etc..
BUT the app is horribly poorly made, loses the recorded map far too often, including the set virtual walls etc. and the support is unfortunately not interested in improving anything or even responding to the 2nd or 3rd mail.

I bought iRobot for my mother and the interaction between the app and the hardware works much better.
At that time, I decided against iRobot for my flat because of the price and the higher levels, which the Deebot manages. It was a mistake!

@Digitec: Can I still return this product?