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

Intel microcode loading support

configname: CONFIG_MICROCODE_INTEL

Linux Kernel Configuration
└─>Processor type and features
└─>Intel microcode loading support
In linux kernel since version 2.6.28 (release Date: 2008-12-24)  
This options enables microcode patch loading support for Intel
processors.

For the current Intel microcode data package go to
<https://downloadcenter.intel.com> and search for
'Linux Processor Microcode Data File'.