are you looking for the cars used by the pros and sim racers during the Rokit racing series? I was guessing the car was one of the Tatuus, but I haven't verified that.
There is a Tatuus F4-T014 https://steamcommunity.com/sharedfiles/filedetails/?id=1782909995&searchtext=tatuus
It's the RF2 car called the Formula Renault 3.5. Dallara Chassis and Zytec 3.5 V8 engine of about 530 hp. DRS but just one slick tyre compound. It was a one make open wheeler series sponsored by Renault that offered a gateway to F1. Pace very comparable to the GP2/F2 cars, maybe 1-1.5 sec slower/lap but about half the price to run. A season as a driver was I think around €300,000. So great value. Sadly it was crowded out by the Bernie/Flavio owned GP2/F2. Their series was run during the F1 weekend and used the same tyre compounds as the F1 cars so became a bit more visible and more teams would support their upcoming drivers in it. Notable winners include Kubica,Van Dorne, Ricciardo, Magnussen, Gasly, Sainz Jnr. Ricciardo was rookie of the year in 2010. https://en.wikipedia.org/wiki/World_Series_Formula_V8_3.5
The Formula Renaul 3.5 is on the workshop. Don't think the liveries are though, that might be a private mod
I've been having a go with this mod (and the BT44) since following "The Race All Star E Sports Series", but I can't work out how to map DRS. is it the "temporary boost" or am I missing something? Maybe a brain. Thanks in advance.