The two players should affirm the exchange for it to be handled from xingwang's blog

At the point when you have the "play on a similar Rocket League Trading Prices stage" box checked, you can welcome them to your gathering in Rocket League. When they acknowledge, select their name or vehicle and pick "Welcome to Trade." 

The two players should affirm the exchange for it to be handled, and an extra commencement will happen, permitting any of the players to drop the exchange if something is wrong.If you have an Epic record that you recently used to combine the entirety of your advancement on various stages, the entirety of your things will be usable as you switch stages with your Epic records. You'll have the option to prepare them regardless of the gaming gadget you're utilizing to play Rocket League. 

Step by step instructions to interface an Epic Games account  Rocketleaguefans.com with Rocket League on various stages.