default or selected kernelversion does not have config value CONFIG_NFT_RBTREE.
Result is shown for kernelversion 6.5.1

Netfilter nf_tables rbtree set module

modulename: nft_rbtree.ko

configname: CONFIG_NFT_RBTREE

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Network packet filtering framework (Netfilter)
└─>Core Netfilter Configuration
└─>Netfilter nf_tables rbtree set module
In linux kernel since version 3.13 (release Date: 2014-01-19)  
source code: