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

CONFIG_DRM_NOMODESET (not configurable)

modulename: drm_nomodeset.ko

configname: CONFIG_DRM_NOMODESET

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>DRM_NOMODESET
In linux kernel since version 5.2 (release Date: 2019-07-07)  
source code:
drivers/gpu/drm//drm_nomodeset.c

is depended by
CONFIG_DRM