default or selected kernelversion does not have config value CONFIG_LNET_XPRT_IB.
Result is shown for kernelversion 6.7-rc3

LNET infiniband support

modulename: ko2iblnd.ko


Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>InfiniBand support
└─>LNET infiniband support
In linux kernel since version 3.11 (release Date: 2013-09-02)  
This option allows the LNET users to use infiniband as an
RDMA-enabled transport.

To compile this as a kernel module, choose M here and it will be
called ko2iblnd.

If unsure, say N.

source code: