Have a Nest thermometer. If the Nest does not see movement for a period of time it thinks you are away, so shuts off. It is located in a part of house that can sees little activity and shuts down when we are actually home. My thought is use Wyze Sense motion detector to tell the thermostat that we are home.
Problem…I have no idea where to start to put these two talking.
Try the app IFTTT. If this then that.
You should be able to make an applet there so for example if the Sense motion sensor detects motion it can trigger your Nest.
I don’t have a Nest so I can’t help more than this.
As @peek suggests I would start with IFTTT. But I believe the IFTTT integration with Nest is going away as Google rebrands everything away from the Nest name. You best bet might be to look at Nest/Google support of remote sensors.
@rbruceporter is correct, Google has pulled the Nest API platform and will be restricting it. When they do this I do not know if what you want will be achievable.