kernelconfig_penguin
default or selected kernelversion does not have config value CONFIG_ATH9K_PCI.
Result is shown for kernelversion 5.9.9

Atheros ath9k PCI/PCIe bus support

configname: CONFIG_ATH9K_PCI

Linux Kernel Configuration
└─> Device Drivers
└─> Network device support
└─> Wireless LAN
└─> PCI support
└─> Atheros ath9k PCI/PCIe bus support

This option enables the PCI bus support in ath9k.

Say Y, if you have a compatible PCI/PCIe wireless card.