default or selected kernelversion does not have config value CONFIG_HAVE_CAN_FLEXCAN.
Result is shown for kernelversion 6.2.5
CONFIG_HAVE_CAN_FLEXCAN (not configurable)
configname: CONFIG_HAVE_CAN_FLEXCAN
Linux Kernel Configuration
└─>Networking support
└─>CAN bus subsystem support
└─>CAN Device Drivers
└─>HAVE_CAN_FLEXCAN