Psyonix has temporarily disabled cross platform play in the Nintendo Switch version of Rocket League.
The function will remain disabled until version 1.44 hits Nintendo Switch in a few days. Online play is still accessible but only with other players on the Nintendo Switch version.
Hi Kieran! Yes, Rocket League players on Switch can still play online, but only with other #RLonSwitch players. Cross-platform play being disabled on Switch is only temporary until v1.44 is live on Switch in a few days. (Date and time to be announced soon.) https://t.co/4OaTCgluOh
— Rocket League (@RocketLeague) April 11, 2018