default or selected kernelversion does not have config value CONFIG_INITRAMFS_COMPRESSION.
Result is shown for kernelversion 6.8.2

CONFIG_INITRAMFS_COMPRESSION (not configurable)

configname: CONFIG_INITRAMFS_COMPRESSION

Linux Kernel Configuration
└─>INITRAMFS_COMPRESSION
In linux kernel since version 4.1 (release Date: 2015-06-21)