Sure thing! Assuming you have SmartThings added to Google Home and the device is visible there, you can use the script editor of Google Home to send you a push notification when SmartThings tells Google Home the device is offline.
The script editor is at home.google.com/automations (use a desktop browser and make sure to be logged in your Google account, more info here) and the script would look like this:
metadata:
name: Door sensor offline notification
description: _
automations:
starters:
- type: device.state.Online
state: online
is: false
device: Entrance sensor - Pasillo
actions:
- type: home.command.Notification
title: Aqara door sensor offline!