The developer's anti-cheat strategy is multi-layered and constantly evolving:

A player's unnatural accuracy is often reported by the community, leading to social ostracization and difficulty finding legitimate squads. How PUBG Mobile Detects Cheating

Cheating software, including "no recoil" scripts and emulator-based mods, is a primary target for PUBG Mobile's anti-cheat systems.

Using unauthorized software to eliminate weapon recoil is a clear violation that results in 10-year bans (effectively permanent).