Google Assistant integration - device questions

So glad native Google Assistant integration is finally here! Been using it but have a couple of quirks I wanted to ask about.

My gate (“cover”) shows up as a light in Google. I have to say “turn on the gate” to open it and turn it ‘off’ to close it. Does google not have “open” and “close” actions?

I can’t seem to control the fan speed by voice (GE z-wave fan control switches). I can turn them on and off but phrases like “set the office fan to low” don’t register. Any workaround for that?