Smart lock for the main entrance door?

I’ve recently developed my enthusiasm for all things keyless.
Now I’ve wondered, there are so many smart locks for your apartment door but do you know any solution for my main entrance door? That is to say, a solution that my landlord will approve of.
Maybe there is a way of install a kind of “intelligent device” into my intercom?!

I didn’t find the right solution from the Internet.

References  https://www.cnet.com/forums/discussions/smart-lock-for-the-main-entrance-door/

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