Oh, my, now I’m getting wrapped up in nests! … I see that, if I add a field on the same level, it is fixed, not draggable.
This is why I’m looking at repeaters and the bootstrap terminology of containers, rows and columns, where columns can have nested rows and columns.
Containters can be reordered, rows can be reordered inside of each container (or column) and columns can be reordered withing each row… with special javascript functionality added to move a row or column to an different parent… Although there is this discussion to consider https://support.advancedcustomfields.com/forums/topic/drag-flexible-content-layouts-between-parent-repeaters/
