Only two dust bags were included, one already inserted, one additional, everything else was just there.
So far I haven't found any specifically for the Ultra Heat, either on Aliexpress or here in Germany. Maybe the things from the L20 or the other L10 will fit...
But most of the time these things are available soon anyway.

You get 2 dust bags and 1 cleaning agent. Then also a small brush etc. You just get one mop for the robot.

2 bags and 1 x liquid included. An accessory set can be purchased later for CHF 40.

Does anyone know where to get a cheap replacement dust box (grey plastic dust collection box)? The thin plastic lip fell out of mine and it hasn't been sucking properly since then.

Hello

The accessories including cleaning agent are on their way and will be available soon.

Dust bags are the same as L10s Ultra and L20 Ultra. As for the cleaning agent, you can buy the 1 Liter one to refill the bottle inserted in the robot.