default or selected kernelversion does not have config value CONFIG_FB_ATARI.
Result is shown for kernelversion 6.0-rc7

Atari native chipset support

modulename: atafb.ko
configname: CONFIG_FB_ATARI

Linux Kernel Configuration
└─> Device Drivers
└─> Graphics support
└─> Frame buffer Devices
└─> Support for frame buffer devices
└─> Atari native chipset support

This is the frame buffer device driver for the builtin graphics
chipset found in Ataris.

source code: