default or selected kernelversion does not have config value CONFIG_8723AU_P2P.
Result is shown for kernelversion 6.4.14

Realtek RTL8723AU Peer-to-peer mode

configname: CONFIG_8723AU_P2P

Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>Realtek RTL8723AU Peer-to-peer mode
In linux kernel since version 3.15 (release Date: 2014-06-08)  
This option enables peer-to-peer mode for the r8723au driver. Unless you
know that peer-to-peer (P2P) mode will never be used, or the target system has
limited memory, "Y" should be selected.