Can anybody either confirm or deny something for me?

I’ve had the delorean in rocket league for years now but here’s the catch, it’s considered Nintendo switch dlc and not usable on any other console unless I want to shell out 15 bucks when it comes around next. Since I own the car, regardless of its dlc status will I get it on all platforms in Fortnite? Or will I have to log into my switch in order to get it to cross over?