default or selected kernelversion does not have config value CONFIG_LIRC_IMON.
Result is shown for kernelversion 6.5.1

Legacy SoundGraph iMON Receiver and Display

modulename: lirc_imon.ko

configname: CONFIG_LIRC_IMON

Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>Media staging drivers
└─>Linux Infrared Remote Control IR receiver/transmitter drivers
└─>Legacy SoundGraph iMON Receiver and Display
In linux kernel since version 2.6.36 (release Date: 2010-10-20)  
Driver for the original SoundGraph iMON IR Receiver and Display

Current generation iMON devices use the input layer imon driver.

source code: