I have a 2019 Space Star CVT I bought new a month ago. Around where I live, the speed limit on the highway is 100km/h (about 60mph) near the city and outside the city it gets up to 120km/h (about 75mph). On my drive this morning I watched my RPMs at 100km/h and it was pretty consistent between 2,000 and 2,500 (using cruise control).
Next time I am in a 120km/h zone I'll see what the RPMs are, but I did just do a 500km trip last week and the only time I felt the RPMs were really high was when I was going up some back roads in the mountains.