Of course it's apples and oranges, but I used it on EOS-R, works without any problems.
Only strange thing I noticed - batteries in the grip (3rd party also) do not get charged via USB-C. Not sure if it's bug or a feature, but it may make sense, as 2 batteries might draw too much power.
If you plug USB-C cable directly into (detached) grip, it gets charged, even with the same charger.
So be aware of such behaviour and test if it matters for you.