Did you buy Rocket League DLC disappear?

I bought a car in 2018 so i bought a DLC from rocket leauge then i switched to the pc and bought rocket league because i had it on ps4 before but since the switch to epicgams the car is gone but a friend of them what remained on the ps4 is still has the cars

You have all the cars that have ever been sold as DLC. They are just no longer highlighted in green, in the garage, as usual

They are no longer in my collection

Oh, have you bought Rocket League on your PC or downloaded it for free?

I bought it on the ps4 in 2018 and there a dlc and have now downloaded it for free from epic games but linked my ps4 account to my epicGames account