If your DLC is not in inventory, use this article to regain your purchased Items on your PlayStation.
PlayStation 5
- Launch Rocket League
- Select the … icon next to the Play button
- Select View Product
- Select the Add-Ons tab
- Select View All Add-Ons
- Download DLC packs that show as purchased
PlayStation 4
- Launch Rocket League
- Hold down the PlayStation button on the controller
- Select PlayStation Store in the upper left corner
- Locate the Add-Ons tab on the right side
- Press the X button on your controller
- Download may DLC packs that show as purchased
For more info on DLC Sharing, check out: Can I Use My DLC Items On All Platforms?