There is a bug in "Realme Ui" in home screen. The SIM-Toolkit app aically appears in the home screen when we restart our device. this is only happening when we use launcher's
SIM Toolkit 7.1.2 APK Download by Google LLC - APKMirror
Delete SIM Toolkit - Hybrid Sim
Where can I get a SIM toolkit on a Mi mobile? - Quora
Sim Toolkit Error/Error in Application since last update