default or selected kernelversion does not have config value CONFIG_IP_DCCP_ACKVEC.
Result is shown for kernelversion 5.3.7
CONFIG_IP_DCCP_ACKVEC (not configurable)
configname: CONFIG_IP_DCCP_ACKVEC
Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>The DCCP Protocol (EXPERIMENTAL)
└─>IP_DCCP_ACKVEC