Not sure after reading your post what it is you want to control exactly. Google and stuff doesn't explain much.
What is it you want to control? Only thing Trådfri that doesn't work are those cheap buttons with the 0 and 1 on them and their motion sensors. Everything else except for those two can be paired to the Hubitat Elevation hub and is controllable.
It is possible to control devices that are one Google Home using Google Assistant Relay, but that's a little advanced. I don't know your skill level, but it is possible. It doesn't give you status of the device, but you can control almost all of the devices that are compatible with Google Home.
