Android App All Calendars Exchange are not showing

I love the app.  However, it seems to only show calendars that are stored in the "Calendar" folder in an exchange setting.

Info: 
Android 12
OneClaendar 3.7.3
Microsoft Exchange 2013

How to reproduce:
If we have an exchange account.  Then we have our normal "Calendar" then have sub calendars "Mom," "Dad," and "Johnny."  We then have other calendars not as a sub of Calendar, but are sub of "Calendar2" that we named "Work" and "Birthdays."  OneCalendar will only show "Mom," "Dad," and "Johnny" however "Work" and "Birthdays" will not show.