The problem with this method is that it seems to work only once unless the camera is restarted or Google Home otherwise gets some indication that the camera is off. If that doesn’t happen, then Google Home seems to “know” that the camera is already on the second (and third and fourth…) time the Wyze Automation sends the “turn on” signal. A few posts starting here in another topic discuss this.
Although it involves the purchase (or possible repurpose) of another device, I think the Plug or Plug Outdoor (two independent sockets!) is a better option for this kind of automation and for keeping things relatively simple.
Having said that, I’m not sure how to get a Google Home Routine to stream a video on a mobile device as requested. I don’t have a Pixel tablet, but on my Pixel phone I’m not seeing that as an option for a streaming target when I set up a test Household Routine (because it has to be this type in order to use a device turning on or off as a Starter). Even when I just talk to Google Assistant on the phone and ask it to show me the camera, Assistant apologizes and requests “the exact name of the screen”. If I tell it to show me that camera “on this screen” or “on my phone”, then it just gives me search results for cameras. 
If there is, then I’d be interested in learning! I think your best bet is probably just to make sure the tablet gets the doorbell notifications so that you can tap the notification when it arrives and view the video feed that way. If you want to automate that process, then it might be possible with a third-party notification interceptor like MacroDroid (or an alternative) running on the tablet. I imagine you could have it watch for doorbell button press notifications from the Wyze app and then automatically load the stream for you that way (maybe drop a Wyze widget on your home screen to make it easier to launch that camera directly), but I haven’t actually tried this…yet. Now I guess I have another thing to add to my to-do list for this week. 
Welcome to the Forum, @rwadhwa50! 