Hello and welcome to the Homey forum!
That’s very personal and region dependent imho. I’ve never heard of Dreame.
Don’t ever assume things with Homey → Check the app store if a brand/model is supported, else you can
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request for support here
No one requested Dreame yet
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Or request for support here, but here also no one requested Dreame:
Search results for 'Dreame' - Homey Community Forum
Except for Matter enabled devices, (most) supported functions (should) work without an app.
And for zigbee & z-wave enabled devices is very basic support for lights, switches/plugs, like OnOff & dim
