Airbnb is just a marketing platform for your STR business so there isn't any help they can offer @Roy1172 if your guest decides to squat.
I would suggest you post on your local host group and yes I think long stay hosts in the US do send out a separate agreement but legally I don't know what protection it would offer you against long stay guest squatting. You probably want to take legal advice if you are unfamiliar with your local tenancy legislation.
Hello @Roy1172, welcome to the Airbnb Community Center!
Have you had a chance to read our Hosts' suggestions? Building on Helen's advice, here is the link to the Local Host Clubs. You can find the closest one to your location by using the zoom option.