default or selected kernelversion does not have config value CONFIG_RTW88_8821A.
Result is shown for kernelversion 6.6.75

CONFIG_RTW88_8821A (not configurable)

modulename: rtw88_8821a.ko

configname: CONFIG_RTW88_8821A

Linux Kernel Configuration
└─>Device Drivers
└─>Network device support
└─>Wireless LAN
└─>Realtek 802.11ac wireless chips support
└─>RTW88_8821A
In linux kernel since version 6.13 (release Date: 2025-01-19)  
source code:
drivers/net/wireless/realtek/rtw88/


is depended by
CONFIG_RTW88_8821AU