Also, if you are in the US, several lock companies have worked with Amazon to come up with a keypad solution so that delivery people can leave packages in the garage without needing any app access to the home system. So these do exist and are sold by some of the garage controller companies. I believe Liftmaster, for example, has one. But I don’t know what’s available in other countries.
You might contact the garage door controller companies you’re interested in and ask if they have a keypad solution for package delivery. 
These have the advantage of already being synced to the garage door controller and some may even be able to work when the Internet is down.