default or selected kernelversion does not have config value CONFIG_KVM_MMU_AUDIT.
Result is shown for kernelversion 6.9.9

Audit KVM MMU

configname: CONFIG_KVM_MMU_AUDIT

Linux Kernel Configuration
└─>Virtualization
└─>Audit KVM MMU
In linux kernel since version 2.6.37 (release Date: 2011-01-04)  
This option adds a R/W kVM module parameter 'mmu_audit', which allows
auditing of KVM MMU events at runtime.

depends
CONFIG_KVM
CONFIG_TRACEPOINTS
CONFIG_VIRTUALIZATION