default or selected kernelversion does not have config value CONFIG_NF_CONNTRACK_ENABLED.
Result is shown for kernelversion 5.15.113

Netfilter connection tracking support


Linux Kernel Configuration
└─>Networking options
└─>Network packet filtering framework (Netfilter)
└─>Core Netfilter Configuration
└─>Netfilter connection tracking support
In linux kernel since version 2.6.20 (release Date: 2007-02-04)  
Connection tracking keeps a record of what packets have passed
through your machine, in order to figure out how they are related
into connections.

This is required to do Masquerading or other kinds of Network
Address Translation (except for Fast NAT). It can also be used to
enhance packet filtering (see `Connection state match support'

To compile it as a module, choose M here. If unsure, say N.