He spends a lot of time on them, as do some of the other younger pro racers these days.
Article here on how he believes it helps him become a better driver and how the sim racers are closer to real world racers than many people expect.
https://racingnews365.com/how-verstappen-uses-sim-racing-to-...
In the real world the number of factors and variance between cars makes it kind of a personal thing I think. This might explain why Schumacher and Clark both didn't understand why everyone else couldn't go as fast as them.
In Simracing, a lot of things are simulated, but not enough to struggle to wrap your head around eventually. All the parts on all the cars are the exact same and environmental/tire changes are more simple too. It's also much more accessible than driving an open wheel race car competitively.
I think this means driving at the top of sim racing is VERY competitive in terms of errors and % gains. Team money is removed as a 'mark' against your talent too.
On the other hand, driving/cycling/skiing simulations are just simulations. I'm happy to just have a power meter on an indoor cycling trainer. But some people have fancy setups that can tilt for inclines and lean for turns. "Enough realism" is an interesting game design consideration.
He owns/manages his own esports racing team.