Hi there
Erez from Wix Bookings team.
First, I want to make sure you’re familiar with the ability to sync Wix Bookings with Apple Calendar - the import sync functionality already exists 
Second, we’re still in the process of completing the Apple calendar sync, so users could export events to Apple calendar. We are also working on supporting Outlook sync.
I can’t share an exact timeline, but it should be out soon
Best,
Erez