Drivers are generally not audited by Microsoft to be signed, you only need to register your EV cert to get it signed. Cheat developers have registered their own

Drivers are generally not audited by Microsoft to be signed, you only need to register your EV cert to get it signed. Cheat developers have registered their own/gotten their hands on EV certificates to create a kernel driver cheats. Anti cheat like Battleeye also download anti cheat modules at runtime to obfuscate what they do.