Hello,
You did not give any information about with what do you struggling. I will probably not help you because I have no knowledge about this hardware but some one who has, will need more info.
Search results for ‘ECG Max30003’ - Arm Mbed OS support forum
Results for Max30003 - Search | Mbed
No results for ECG 3click Max30003 - Search | Mbed
Maybe you can share information between you and owner of this topic How to code an ECG (Electrocardiogram) click 3 using STM32F446RE? - Mbed OS / Best practice - Arm Mbed OS support forum
MAX30003 - Library for MAX30003 | Mbed
BR, Jan