could you please confirm what part numbers you are referring to? The MAX30100 is a Maxim Integrated Pulse Oximeter and Heart-Rate Sensor IC, but in the link you provided, there is our PCF8575 I/O Expander on an Arduino board. The MAX30100 is not mentioned there.
BTW, unfortunately we do not know MAX30100 and STM32, and we do not support them. I can try to help you with the PCF8575. Please specify your question.
With Best Regards,