Local split screen multiplayer with mobile phones as controllers

Currently I am working on a concept where players would use their mobile phone to control a game running on Unreal. I am handling phone > unreal communication via a third party socket server and the implementation currently works fine with one player. The problem I am running into though, is adding multiple players. For the sake of explanation I am using the rolling ball template, modified to only allow left or right movement, and roll forward automatically. Input is effectively given as a 1 or 0 from the mobile phone that gets interpreted by the blueprint and moves the ball. Since I am not using normal player controls (i.e. those in project settings), making a game allow for local split screen is proving difficult with my limited knowledge of the engine. If any more information or my blueprints are needed let me know. Thank you!