@James Thanks for the suggestions. I really am interested in doing this via javascript. I was wondering if there was any documentation about how to make it happen. I am in fact a developer and am looking for direction.
So far I have been able to add some but it’s spotty. I just call:
acf.fields.flexible_content.add('my_layout_name');
I’m having trouble finding a way to target certain flexible content fields over others.