default or selected kernelversion does not have config value CONFIG_PNFS_OBJLAYOUT.
Result is shown for kernelversion 6.5.1

CONFIG_PNFS_OBJLAYOUT (not configurable)

configname: CONFIG_PNFS_OBJLAYOUT

Linux Kernel Configuration
└─>File systems
└─>Network File Systems
└─>PNFS_OBJLAYOUT
In linux kernel since version 3 (release Date: 2011-07-21)  

is selected by
CONFIG_ORE