Hi @Wade82
I am familiar with the Yale Assure Smart Lock and it can integrate automatically with Airbnb right now with Airbnb (the only smart lock on the market that could up until the announcement about smart lock integration in the Winter Release).
https://shopyalehome.com/pages/airbnb
You go to "Works With" on the Yale App and select Airbnb to setup. However, it will only generate random codes (you don't get to choose the code) and sends an automated message to the guest via Airbnb messaging with the code when they book.
Below is an example of the message that is sent to guests. Many Hosts don't like this message as it is too long, so they send their own message or include the door code generated in their check-in message.
The new Airbnb 2023 Winter Release says Airbnb will have automatic integration with several smart locks soon (Yale, Schlage, August in US & Canada). So you can also use that to generate codes automatically. Again, they are random codes; you don't get to choose them.
There are several 3rd party vendors (I have heard RemoteLock mentioned alot) that can do this as well, but I haven't used them but other Hosts have and seem happy with them. I heard they increase their prices though.