This content was released on Feb 20 2020. The official support period is 6-months from this date.
Create a photo album for the collages (i.e. "Stitches") or fetch the album if it already exists, then set up a collection view to display that album's images.
This is a companion discussion topic for the original entry at https://www.kodeco.com/7910383-ios-photos-framework/lessons/6