I've got the impression that the big US exports are ones that play into big American stereotypes, e.g WTR, Baywatch, Friends. Not even that they see these shows and get programmed with these stereotypes, but that they have these stereotypes (Texas, California, NYC) and shows like this feed their imaginations and give them detail.

Exported media is weird. Like the huge proportion of British/BBC output (usually period, but also often detective in a way redolent of Christie) that is made primarily for export to foreign consumers who think of British upper-class culture as aspirational.