ISSUE: when adding Mybookings widget to website built on Wix platform, the calendar date picket is cut off.
EXPLANATION: Wix platform is allow to add widgets only into iframe of the fixed size, that's why any content which is bigger the size of iframe will be cut off.
SOLUTION: You can try to make iframe bigger for solving this issue using HTML iFrame app by Wix.
You can adjust the numbers for width and height and see if the code will fit into the new iframe size. Please, see this link which will show you how to make the adjustments: https://www.w3schools.com/tags/att_iframe_height.asp