COD Mobile doesn't release any official emulators, but it is legal to play this game on PC using emulators like GameLoop. Therefore, you will not get banned using GameLoop, and some players get banned because of the anti-cheat system, not because of using emulators.

The official way to play Call of Duty: Mobile on your PC is via GameLoop. This particular program used to go by the name 'Tencent Gaming Buddy', and is an official Android emulator, created by Tencent itself.