So guys, the Support said yesterday:
Wyze Duo Cam Doorbell has an SD card slot and it is supported with the Wyze Web View feature. Please note that you will need to have a Cam Plus or Cam Unlimited subscription to use Wyze Web View. You can hardwire the device or use the battery.
Only thing remains in question is if the specific transformer I had purchased [link below] which is currently working with my Video doorbell PRO will work with the duo cam? I am waiting on their Support specialists team to confirm.