The short answer to that is each yes and no from dakunlee's blog

The short answer to that is each yes and no. The tradability of an object is decided upon which platform it became at the start crafted on. This manner that in case you construct a Blueprint the use of RL Items credit on PC, you received’t be capable of alternate that item with Xbox gamers, even if you log into the game with an Xbox. 

Other tradable objects will be tradable irrespective of which platform you first acquired them, but you’ll best be capable of provoke trades with gamers that are logged into the same platform as you. If you’d like to exchange an item to a pal on an Xbox as a PC player, you’ll both want to switch to an Xbox yourself or have them log into the game thru a PC.

Trading go-platform on Rocket League will require you to have get right of entry to to more than one gaming structures. If you’d want to exchange with a participant on Nintendo Switch, you’ll need to lolga.com log into the sport from one yourself or invite them for a trade after they’re playing on your chosen platform.