Hey @KKL719,

You should be able to use the Matter Setup Code for the device found in your device's settings under Device Info > Matter Setup Code.

It is worth noting that setting the device up in the Tapo App initially, does not actually use Matter and instead opts for our typical Wi-Fi connection.

As an added note, I typically recommend setting the device up in the Tapo App first simply to update the firmware of the device to help streamline the process and minimize chances for error, as Matter devices will often be updated with optimizations to their setup process. After updating the device, you are always free to reset the device to factory defaults and directly add the device if you wish. The Tapo app will then detect the device on your network and offer to add the device to your TP-Link ID.

  @KKL719,

For the device to be added to Hubitat, I am pretty sure it has to be operating as a Matter Controller, at least in some capacity.

Once that first Matter code is used for another platform, the share codes will be generated in that Matter platform - meaning the option for additional codes would be provided in the Hubitat App or Interface.

I think the easiest way to state this is that the Tapo App is not a Matter Controller, and the QR code is there for users who scrape off the sticker. The connection to the Tapo App is just a standard connection and doesn't touch the Matter compatibility. After setting up the device in the Tapo App, you then have to start the Matter setup process with the QR code on the device or replugging the device and adding the device directly in the destination platform. At that point, Multi-Admin would be 'managed' by the first Matter platform and can generate the sharing codes for secondary platforms.

As an example from when Matter first released, the Alexa App did not offer an option or setting to generate multi-admin codes for secondary platforms. This meant that if the device was added to Alexa as its primary matter controller, the device could not be added to another platform via Matter since there was no function to generate the Multi-Admin QR code.