Hi @cdn4lf , thank you for posting in the Q&A forum.
Per my test, most supported columns do hide for Document Set content type, such as Single Text fields or Date fields. But the formula does not save on some other types of columns like “Description” fields.
However, it works on all documents within a document set, as long as the column type is supported in conditional show or hide, no matter where the documents are located.
It seems that there have been other restrictions on Document Set content type that are not covered in this document. You may switch to other types of columns and see if you can save the formulas.
If an Answer is helpful, please click "Accept Answer" and upvote it.
**Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread. **