It would be great had there been a parameter to specify whether to prepend or to append the section with regard to the free text content.

Due to this limitation, instead of sections in forms, I'm currently using textarea fields and a template that selectively shows a section header based on whether
there's content in the field.

But I think it would be cleaner in terms of form and template design, and most important, probably more efficient in terms of storage (?) to just use section fields directly, as long as there's no need to handle it by templates (or SMW).

Current functionality of section tags is documented at
https://www.mediawiki.org/w/index.php?title=Extension:Page_Forms/Defining_forms&oldid=3033675#'section'_tag

See also: T227593