default or selected kernelversion does not have config value CONFIG_GPIO_AXP209.
Result is shown for kernelversion 6.7-rc3

X-Powers AXP209 PMIC GPIO Support

modulename: gpio-axp209.ko

configname: CONFIG_GPIO_AXP209

Linux Kernel Configuration
└─>Device Drivers
└─>GPIO Support
└─>Memory mapped GPIO drivers
└─>X-Powers AXP209 PMIC GPIO Support
In linux kernel since version 4.1 (release Date: 2015-06-21)  
Say yes to enable GPIO support for the AXP209 PMIC

source code: