The Ninth Circuit has reversed a summary judgment decision in favor of a dairy farm that recruited workers through the TN program, forced them to perform menial labor, and threatened to have them deported if they left their employment. This case has useful analysis for T visa applications, though it was not brought in the context of an application for immigration benefits.
The full text of Martinez-Rodriguez v. Giles can be found here:
https://cdn.ca9.uscourts.gov/datastore/opinions/2022/04/18/19-35526.pdf