default or selected kernelversion does not have config value CONFIG_NET_VENDOR_EXAR.
Result is shown for kernelversion 6.0-rc6

Exar devices


Linux Kernel Configuration
└─> Device Drivers
└─> Network device support
└─> Ethernet driver support
└─> Exar devices

If you have a network (Ethernet) card belonging to this class, say Y.

Note that the answer to this question doesn't directly affect the
kernel: saying N will just cause the configurator to skip all
the questions about Exar cards. If you say Y, you will be asked for
your specific card in the following questions.