default or selected kernelversion does not have config value CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE.
Result is shown for kernelversion 6.9.1

userspace

configname: CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE

Default CPUFreq governor
└─>userspace
In linux kernel since version 4.2 (release Date: 2015-08-30)  
Use the CPUFreq governor 'userspace' as default. This allows
you to set the CPU frequency manually or when a userspace
program shall be able to set the CPU dynamically without having
to enable the userspace governor manually.