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

Require all keys on the .ima keyring be signed (deprecated)

configname: CONFIG_IMA_TRUSTED_KEYRING

Linux Kernel Configuration
└─>Security options
└─>Require all keys on the .ima keyring be signed (deprecated)
In linux kernel since version 3.13.1 (release Date: 2014-01-29)  
This option requires that all keys added to the .ima
keyring be signed by a key on the system trusted keyring.

This option is deprecated in favor of INTEGRITY_TRUSTED_KEYRING