CONFIG_MULTI_IRQ_HANDLER is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
default or selected kernelversion does not have config value CONFIG_MULTI_IRQ_HANDLER.
Result is shown for kernelversion 6.7-rc3

CONFIG_MULTI_IRQ_HANDLER (not configurable)

configname: CONFIG_MULTI_IRQ_HANDLER

Linux Kernel Configuration
└─>System Type
└─>MULTI_IRQ_HANDLER
In linux kernel since version 2.6.38 (release Date: 2011-03-14)  
Allow each machine to specify it's own IRQ handler at run time.