Psyonix has just announced that it plans to bring Rocket League to mobile. Rocket League Sideswipe will feature quick two-minute 1v1 or 2v2 games, a competitive mode, and more. The game is likely to be launched later in 2021.
https://www.notebookcheck.net/Rocket-League-Sideswipe-to-be-launched-on-mobile-devices-soon.529196.0.html