default or selected kernelversion does not have config value CONFIG_BATTERY_BQ27X00_I2C.
Result is shown for kernelversion 6.5.1

BQ27200/BQ27500 support

configname: CONFIG_BATTERY_BQ27X00_I2C

Linux Kernel Configuration
└─>Device Drivers
└─>Power supply class support
└─>I2C support
└─>BQ27200/BQ27500 support
In linux kernel since version 2.6.39 (release Date: 2011-05-18)  
Say Y here to enable support for batteries with BQ27x00 (I2C) chips.