The RF 85mm 1.2 isn't stabilised but I don't think that's relevant now as you get that from the body so it's not a big deal like it used to be.
As soup dragon says, this lens is as close to perfect as I've seen, 2 downsides, the price and the size

But you can't have an 85mm 1.2 and it not be big.
I was testing it yesterday on the dog and my wife, even at 1.2 it never missed.
It stuck to the dogs eye like glue, so all I had to worry about was composition in the frame, with confidence the focus will hit.
I used to have EF lenses but started my transition to RF in late 2019, over the last 2 years I've put together a good collection
RF 100-500mm f/4.5-7.1L
RF 70-200mm f/2.8L
RF 85mm f/1.2L
RF 50mm f/1.2L
RF 15-35mm f/2.8L
I can tell your each one of them is perfect in its own right.
I've had the 70-200 and 15-35 for 2 years now and just love them, got the 50 and the 100-500 last year, for wildlife the 100-500 is incredible, so much so that I chose not to buy a big white, I didn't see the point to be honest as I'm not a full time photographer, so spent that cash on the R3 instead.
I've used the 50mm a lot, it's probably on the camera more than anything else, and now I've just got the 85mm which I'll be using at every opportunity.
So I guess in summary, you won't regret buying a premium RF lens.