default or selected kernelversion does not have config value CONFIG_LEDS_PCA9685.
Result is shown for kernelversion 6.5.1

LED support for PCA9685 I2C chip

modulename: leds-pca9685.ko

configname: CONFIG_LEDS_PCA9685

Linux Kernel Configuration
└─>Device Drivers
└─>LED Support
└─>I2C support
└─>LED support for PCA9685 I2C chip
In linux kernel since version 3.13 (release Date: 2014-01-19)  
This option enables support for LEDs connected to the PCA9685
LED driver chip accessed via the I2C bus.
The PCA9685 offers 12-bit PWM (4095 levels of brightness) on
16 individual channels.

source code: