default or selected kernelversion does not have config value CONFIG_BLK_DEV_INITRD.
Result is shown for kernelversion 5.15.113
Initial RAM filesystem and RAM disk (initramfs/initrd) support
modulename: initrd.ko
configname: CONFIG_BLK_DEV_INITRD
Linux Kernel Configuration
└─>Device Drivers
└─>Block devices
└─>Initial RAM filesystem and RAM disk (initramfs/initrd) support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)
The initial RAM filesystem is a ramfs which is loaded by the
boot loader (loadlin or lilo) and that is mounted as root
before the normal boot procedure. It is typically used to
load modules needed to mount the "real" root file system,
etc. See Documentation/initrd.txt for details.
If RAM disk support (BLK_DEV_RAM) is also included, this
also enables initial RAM disk (initrd) support.
boot loader (loadlin or lilo) and that is mounted as root
before the normal boot procedure. It is typically used to
load modules needed to mount the "real" root file system,
etc. See Documentation/initrd.txt for details.
If RAM disk support (BLK_DEV_RAM) is also included, this
also enables initial RAM disk (initrd) support.