That board is designed to serve many purposes:
* Provide an USB 3.1 Gen 2 capable data connection
* Provide a power connection both ways - the USB Type C Port acts as a dual role port (DRP), so it has both upstream and downstream facing capability
* Use a STM32 to handle the PD protocol and power negotiation
* Snap-off sections if ether the PD/micro section or the screw terminal are not needed, so if the board is only used as an adapter
If i connect tablet to the USB_C connector and device to USB A connector, and charger to the socket , does the tablet will charging while the data transfer between the tablet and device ? did you check this scenario ?