Um...Where is the multiplayer exactly?!

I bought the ultimate edition and figured since I was participating in early access, that they only had a certain amount of multiplayer modes to play. Now that I’ve checked since the full release, they still don’t have any more modes? So you’re telling me, that even though I have about 30 cars I can race with right now, 5 of them can be used in multiplayer? What happened to class racing? Why are there no touring cars, nascar, sports cars, etc? Just muscle, super cars and “toys” ? [Mod Edit - Abbreviated profanity, profanity and profanity that is disguised but still alludes to the words are not permitted - D]