Instant Experiences are a full-screen, mobile optimized post-click ad destination that loads nearly instantaneously from ads in Feed. Within an Instant Experience, people can watch engaging videos and photos, swipe through carousels, tilt to pan and explore lifestyle images with tagged products - all in a single ad.
As of April 24, we are adding 3 new customization options to product set-based Instant Experiences created in the Marketing API:
Impacted endpoint is:
gr:post:Page/canvas_elements
For more information, please review the below documents:
Collection Ads - Meta Marketing API - Dev docs