As per the official Rocket League Items declaration

As per the official Rocket League Items declaration, the center interactivity will continue as before, yet the fundamental menus will be refined. You can expect patched up and improved Tournaments and Challenges, and cross-stage movement. 

When the game goes allowed to play, you will have the option to bring your stock, Rocket Pass progress, and serious position to any stage where you play the game by utilizing your Epic Games Account. 

Rocket League will deliver on the Epic Games Store on PC a similar time it goes allowed to play. This form of the game will be indistinguishable from the rendition found on different stages and will highlight cross-stage play anyplace you play, including between www.lolga.com the Epic Games Store and Steam.