default or selected kernelversion does not have config value CONFIG_REGULATOR_RT5133.
Result is shown for kernelversion 6.18-rc3

Richtek RT5133 PMIC Regulators

modulename: rt5133-regulator.ko

configname: CONFIG_REGULATOR_RT5133

Linux Kernel Configuration
└─>Device Drivers
└─>Voltage and Current Regulator Support
└─>GPIO Support
└─>Device Tree and Open Firmware support
└─>Richtek RT5133 PMIC Regulators
This driver adds support for RT5133 PMIC regulators.
RT5133 is an integrated chip. It includes 8 LDOs and 3 GPOs that
can be used to drive output high/low purpose. The dependency of the
GPO block is internally LDO1 Voltage.

source code: