default or selected kernelversion does not have config value CONFIG_RPCSEC_GSS_KRB5_CRYPTOSYSTEM.
Result is shown for kernelversion 6.7-rc3

CONFIG_RPCSEC_GSS_KRB5_CRYPTOSYSTEM (not configurable)

configname: CONFIG_RPCSEC_GSS_KRB5_CRYPTOSYSTEM

Linux Kernel Configuration
└─>File systems
└─>Network File Systems
└─>RPCSEC_GSS_KRB5_CRYPTOSYSTEM
In linux kernel since version 4.14.326 (release Date: 2023-09-23)