You’re welcome, and thank you for sharing the article about Nest. I don’t own any of those products, but reading the article made me wonder about what my sister and brother-in-law use, and when I look up the settings for their smart thermostat in Google Home, I can see that it’s a “Nest Learning Thermostat (3rd gen)”, so it should be unaffected…for now. That also made me think about what Belkin did with some Wemo products recently. My sister’s household does have a couple of those smart plugs that can no longer contact the mothership.
It is possible to get Video Doorbell v2 to auto-stream to Google Home devices—I’ve done it with a Google Home Hub (1st gen), Chromecast HD, and Google TV—but it requires a work-around with another Wyze device that can act as an Automation Starter within Google Home. For example, you can create a Wyze Automation that turns on a Wyze Plug when the doorbell button is pressed a Google Home Automation that broadcasts an announcement and streams the doorbell camera feed to screens. That’s what I did for a while when I was regularly using Video Doorbell v2. You can find more detailed information at that link or by searching the Forum.
To add some detail to the Help Center article I linked above, if you open the settings for your Video Doorbell v2 within the Google Home app (where you would navigate to assign it to a home or room or change the device’s name within Google Home), you should see a Voice notifications toggle. I believe that’s useful only if your Video Doorbell v2 attached to a Wyze subscription (Cam Plus, Cam Unlimited, etc.). If your doorbell is subscribed and has person detection notifications enabled in the Wyze app, then your Google Home smart speakers/displays should sound a broadcast announcement whenever the camera detects a person.
The person detection announcements are helpful, but I sometimes get false alarms. (You can click or tap to expand this if interested.)
I’m currently using Battery Video Doorbell with a Cam Unlimited subscription. I have Event Recording set for Smart Detection Events with all available SMART MOTION options selected (except Friendly Faces). The device is linked to my home in Google Home, and on its settings page there I have Voice notifications enabled. Additionally, the device is linked in Amazon Alexa, where its settings have Person Detection Announcements enabled.
What often happens when a person shows up on the front porch is that I get voice announcements from both Google Home smart speakers and Amazon Echo devices that a person has been detected by the doorbell, and those announcements are nearly always legitimate. Occasionally I will hear a voice announcement about a person detected from Google Home but not from Alexa, and those—the announcements that I get from Google Home but not from Amazon Alexa—overwhelmingly seem to be false alarms.
I don’t know what accounts for this discrepancy. I would expect Wyze’s server-based person detection to send the same signal to both third-party integrations, but this doesn’t seem to be the case, at least not from my user’s perspective based on the announcements I hear (or don’t). 
Regarding other 3rd-party stuff with Google Home, I’ve read that some of Walmart’s onn-branded cameras are specifically designed to work with Google Home, but I don’t have any experience with those cameras or doorbells. I guess they selectively open their ecosystem and allow things to be built to their specifications for compatibility if the money is right.