default or selected kernelversion does not have config value CONFIG_IP_NF_MATCH_CONNBYTES.
Result is shown for kernelversion 5.4.123

Connection byte/packet counter match support

modulename: ipt_connbytes.ko

configname: CONFIG_IP_NF_MATCH_CONNBYTES

Linux Kernel Configuration
└─>Networking
└─>Networking options
└─>Network packet filtering (replaces ipchains)
└─>IP: Netfilter Configuration
└─>Connection byte/packet counter match support
In linux kernel since version 2.6.14 (release Date: 2005-10-27)  
This option adds a `connbytes' match, which allows you to match the
number of bytes and/or packets for each direction within a connection.

If you want to compile it as a module, say M here and read
Documentation/modules.txt. If unsure, say `N'.

source code: