One thing I did recently, which may or may not have affected this.. I converted my account from Personal to Business. There is no cost associated or anything like that, its just a profile setting. I'm not sure if the "Team" link only appears for business listings.
In our case, we are a business, we are a hotel with our own internal reservation system and also use Airbnb as an extra channel. It has been a huge problem for us before that we couldn't delegate responses to airbnb customers to our sales team.
Now with this new feature, we have role-based access for everyone, even our security guards can view the calendar and know when guests are arriving from Airbnb.
so if you don't see the Team link on your top navigation, consider modifying your setting to be a business listing so that you can enable this feature.