System Launcher, as the name suggests is an inbuilt app that displays all installed apps in your device and enables you to launch them. Apps like phone and messaging, browsers, calculators, etc. System Launcher's user interface varies from device to device.
Setting Path:
realme UI 1.0 and above version: Settings > Apps/App management > Default app > Home app > System launcher.
realme UI R & S & T & Go & U Edition: Settings > Apps > Default app > Home app > Quickstep.
