Yeah, I have thermostat, alarms, door sensors, pretty much everything... and it all works well within the Nest app (I haven't migrated to Google) and Home app.
They have discontinued as they have partnered with another arm/security company but who knows what that will yield.
Interesting, my biggest issue is how to mount the sensors on the windows, the current ones I have just aren’t quite consistently performing which means they randomly go off!
I did ponder importing a nest alarm, do you have other nest stuff? I take it that it all integrates ok?
Edit: Apparently they have discontinued Nest Secure https://www.theverge.com/2020/10/19/21523967/google-discontinues-nest-secure-alarm-system