1. For CYPD3121, it is target part number of power bank, you could get standard firmware hex inside when you ordered the chip (Do not includes ES). And then update configure table with EZ-PD configuration Utility.
2. Or use CYPD3125 with CY4531 EVK and SDK. Based on CY4531 EVK and SDK, it is configured as DRP and Data source, which is covered DRP application (Power bank use this application) already.
3. Or use CCG3PA, CY4532 EVK can show power bank directly.