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