Hi,
As per your application, you can have 3 ways to choose to upgrade your hardware/software combination-
1. If you go for PSoC6 + CYW43012 you'll have to go for MODUS as WICED doesn't have much support on PSoC6. There is no specific user guide on the porting steps. But the APIs and the environment are quite similar so it won't be difficult to port the application.
2. If you go for STM MCU +43012, you can port WHD onto the host STM MCU and use STM Cube IDE for your application. In this case too, it would require porting efforts on the driver as well as on the application side. I provide the link for your reference to port WHD onto STM-
https://github.com/Infineon/stm32-connectivity
3. If you want to stick with WICED, you can either explore the existing platforms that are present in the "platforms" folder of WICED and can choose one of them or else you'll have to import MCU-specific files into the WICED IDE. I provide you the link for your reference. You can have a look on how STM32F469 MCU porting has been done.
https://community.cypress.com/t5/Resource-Library/STM32F469-porting-in-WICED/ta-p/246317
Thanks
Aditi
