default or selected kernelversion does not have config value CONFIG_ARM_PKVM_GUEST.
Result is shown for kernelversion 6.12-rc6

Arm pKVM protected guest driver

modulename: arm-pkvm-guest.ko

configname: CONFIG_ARM_PKVM_GUEST

Linux Kernel Configuration
└─>Device Drivers
└─>Virtualization drivers
└─>Arm pKVM protected guest driver
In linux kernel since version 6.1.112 (release Date: 2024-09-30)  
Protected guests running under the pKVM hypervisor on arm64
are isolated from the host and must issue hypercalls to enable
interaction with virtual devices. This driver implements
support for probing and issuing these hypercalls.

If unsure, say 'N'.

source code: