Sync Items and Subitems from Multiple Boards to Outlook Calendar

I would like our deadline columns in Monday to sync with an Outlook calendar. So far I have successfully done this with one date column from one board, but I have dozens more boards to go. I do not want to add dozens of calendars to Outlook to achieve this. (And this doesn’t help me gain access to the dates hidden in Subitems, because seemingly I cannot sync those with Outlook)

I tried creating a dashboard calendar on Monday, which pulls in the correct items and subitems from multiple boards. This looks great, and is exactly the functionality I want in Outlook. However, I can’t figure out how to create a sync URL between a dashboard and an Outlook calendar.

I have several questions from this process:

  1. Does anyone know of a way to create a calendar sync URL between a dashboard and an Outlook calendar?
  2. Can I sync subitems with an Outlook calendar, or just Items?
  3. Is there a more streamlined way to sync dates from multiple boards with Outlook, or do I need actually import dozens of URLs and calendars to make this work?

Thanks for any help you can provide!