I was directed to this: https://wiki.st.com/stm32mpu/wiki/PMIC_hardware_components
Apparently only I2C4 and I2C6 are supported for secure operation and as such aren’t supported by ST for this.
I was directed to this: https://wiki.st.com/stm32mpu/wiki/PMIC_hardware_components
Apparently only I2C4 and I2C6 are supported for secure operation and as such aren’t supported by ST for this.