CONFIG_IPL is not available for thedefaultarchitecture x86.
Result is shown for architecture s390
default or selected kernelversion does not have config value CONFIG_IPL.
Result is shown for kernelversion 6.2.5

Builtin IPL record support

configname: CONFIG_IPL

Linux Kernel Configuration
└─>Base setup
└─>Builtin IPL record support
In linux kernel since version 2.6.12  
If you want to use the produced kernel to IPL directly from a
device, you have to merge a bootsector specific to the device
into the first bytes of the kernel. You will have to select the
IPL device.