For starters, PUBG for PC and console was developed by PUBG Corporation- a subsidiary of Korean game developer, Bluehole. However, the mobile version is produced by the Chinese gaming company as Chinese games.
Although it is difficult to replace these apps because of their craze among the people, there are similar apps like Freefire and Fortnite one can opt for. FreeFire is developed by 111 Dots Studio and published by Singapore-based Garena. Whereas, Fortnite has comes from Epic Games, US. One must note that Tencent owns a 40% stake in Epic Games.