default or selected kernelversion does not have config value CONFIG_IP_ROUTE_FWMARK.
Result is shown for kernelversion 5.4.123
IP: use netfilter MARK value as routing key
configname: CONFIG_IP_ROUTE_FWMARK
Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>IP: use netfilter MARK value as routing key
In linux kernel since version 2.6.12
If you say Y here, you will be able to specify different routes for
packets with different mark values (see iptables(8), MARK target).
packets with different mark values (see iptables(8), MARK target).