Facebook has let us know about the upcoming changes in the Facebook Messenger platform that we wanted to share with you:
"During F8 this year, we announced our plans to launch a lighter, better and simpler Messenger designed to build closer connections between people and businesses. As part of these efforts to thoughtfully prioritize features that best deliver this experience, we are announcing an additional set of feature changes to the Messenger Platform. "
Vertical list templates will no longer be supported effective August 15th, 2019. Please make any changes necessary prior to August 15th. If you have any vertical list templates, they will be displayed as carousels after August 15th.
List templates are not commonly used in our platform but display as vertical lists for customers. Here is an example from Facebook of list templates: