IMAP folder subscription on Apple/Mac Mail

[Alex]

Hi,
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?
https://wiki.dovecot.org/Clients

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.
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