Going to suggest the folding ideas YouTube channel on the same topic.

youtu.be/JTfhYyTuT44?si=m2b1gAkCOlDOnCle

Spoiler: his hypothesis, well supported in my opinion, is that a large proportion of those formerly in flat earth are now neck deep in qanon, and since the film was made many are now into other conspiracy stuff. The election was fake etc.

Also, his video of minnewanka lake is just perfect flat earth debunking.