CONFIG_AP is not available for thedefaultarchitecture x86.
Result is shown for architecture s390
default or selected kernelversion does not have config value CONFIG_AP.
Result is shown for kernelversion 6.10-rc4

Support for Adjunct Processors (ap)

modulename: ap.ko

configname: CONFIG_AP

Linux Kernel Configuration
└─>I/O subsystem
└─>Support for Adjunct Processors (ap)
This driver allows usage to Adjunct Processor (AP) devices via
the ap bus, cards and queues. Supported Adjunct Processors are
the CryptoExpress Cards (CEX).

To compile this driver as a module, choose M here: the
module will be called ap.

If unsure, say Y (default).

source code:
is selected by
CONFIG_VFIO_AP
CONFIG_ZCRYPT