default or selected kernelversion does not have config value CONFIG_FB_TFT_FBTFT_DEVICE.
Result is shown for kernelversion 6.9.9

Module to for adding FBTFT devices

modulename: fbtft_device.ko

configname: CONFIG_FB_TFT_FBTFT_DEVICE

Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>Support for small TFT LCD display modules
└─>Module to for adding FBTFT devices
In linux kernel since version 4 (release Date: 2015-04-12)  
source code:
drivers/staging/fbtft/fbtft_device.c