Hey @MBSHC - thanks for posting!

There's not a way to share open availability specifically, but you are able to link your Facebook and Instagram to your Online Booking site using Square Appointments. That way your clients can easily snag any open slots with one click once they land on your booking page!  Please note, you'll need to set up a Facebook Business profile and a Instagram Business Profile to do this. 

We currently don't have this feature for other social platforms like Twitter. As a workaround, sellers usually copy their site link and post it in their bios. Learn more about integrating your booking site with Facebook and Instagram !