1. CY7C6510 is pre-programmed chip. If your design is correct, which is means the D+and D- from CY7C65210 have connected to USB host, the CY7C65210 should be enumerated as HID device. If the enumeration was successful, our EZ-PD Configuration Utility should be identify it after the driver have been installed. (Billboard driver could find on folder path: C:\Program Files (x86)\Cypress\EZ-PD Configuration Utility\BillboardDriver.)
2. NCP81239 will not be appeared on EZ-PD Configuration Utility, since it is only DC/DC convector and CCG2 controlled it via I2C.
3. I do not know what's your modified Dock/Monitor application have been done. It will be helpful if you could attach your block diagram simillar as Cypress schematic. Since I am not sure whether you have display port feature on your end or not. So far, we do not have display port sink firmware source code on CCG2. If you have display port sink, you have to refer CCG3 CTD example (folder path: C:\Program Files (x86)\Cypress\EZ-PD CCGx SDK\CCG3-CCG4\Firmware\projects\CYPD3123-40LQXI_ctd_us) to implement it.