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

SAME target support

modulename: ipt_SAME.ko

configname: CONFIG_IP_NF_TARGET_SAME

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Network packet filtering (replaces ipchains)
└─>IP: Netfilter Configuration
└─>SAME target support
In linux kernel since version 2.6.12  
This option adds a `SAME' target, which works like the standard SNAT
target, but attempts to give clients the same IP for all connections.

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

source code: