New listings are imported as "disabled" by default. This is so users are not charged for listings unless they enable them.
To enable a listing so that Host Tools can send messages, set smart lock codes, or set availability and pricing, follow these steps:
Click on your profile photo in the upper right-hand corner.
Click on "Settings"
Scroll down to find the listing you want to enable and click the "Settings" button next to it.
Check the box next to "Enable Listing"