That’s for breaking a bcrypt hash, and I don’t believe there’s any way to extract the pin hash from a phone since it happens inside a secure hardware layer (like a TPM). If it is possible, the attacker would most likely have to physically destroy your phone to get at it. To bruteforce a 4 digit pin with retry lockout timers, it takes 16 hours to try all combinations, according to a tool I found that auto-enters pins via usb keyboard emulation.