We have a user with an iPhone who can't see their maildir mailboxes on dovecot-2.3.20 on fedora37. I've created a "subscriptions" file with all maildir mailboxes with the proper format (converted from mboxes using mb2md), but the user can only see their inbox.

It appears this may be a known problem?

Perhaps it's a problem with my "subscriptions" file, despite being able to see all mailboxes using K-9 on my android?

Ideas for troubleshooting would be greatly appreciated.