CONFIG_PTDUMP_STAGE2_DEBUGFS is not available for thedefaultarchitecture x86.
Result is shown for architecture arm64

Present the stage-2 pagetables to debugfs

configname: CONFIG_PTDUMP_STAGE2_DEBUGFS

Linux Kernel Configuration
└─>Virtualization
└─>Kernel-based Virtual Machine (KVM) support
└─>Present the stage-2 pagetables to debugfs
In linux kernel since version 6.1.112 (release Date: 2024-09-30)  
Say Y here if you want to show the stage-2 kernel pagetables
layout in a debugfs file. This information is only useful for kernel developers
who are working in architecture specific areas of the kernel.
It is probably not a good idea to enable this feature in a production
kernel.

If in doubt, say N.