Hi Bartek,
welcome to the Homey Community Forum!
If there is no App available for this vacuum cleaner, then it’s not possible to connect it to Homey.
But it’s possible:
- to ask in an appropriate topic (e.g. [APP][Pro] Xiaomi Mi Home App) if the developer is willing to add the device
- to ask in the topic [Requests] Homey Pro Community App Requests if a community member is willing to program an app for this device
- to make a request on this official page Request A Brand of Athom
It’s also possible to integrate non supported devices into Homey via other Smarthome systems, e.g. via Home Assistant and the Homey Home Assistant Community App.