Hi,
Thank you for asking about taking reservations through your site.
The reversations application and resturants apps have not been implemented into Editor X yet.
You are looking to allow customers to book a table or seats on the site, then we recommend that you use the Wix Bookings app on Editor X.
If this does not met your criteria, then we recommend to use the Classic Wix Editor with the reverations app.
We will update the forum when we have implemented more apps into Editor X.