How do I get non default calendars to show up on iOS (iPhone/iPad)? I was able to connect my iPhone to multiple Google accounts and have the default calendars show up on my iPhone and iPad correctly.  But how do I get the non default google calendars to show up as well?
Apparently there is a secret URL you have to visit to check off which calendars you want to appear on your iOS device.

https://calendar.google.com/calendar/iphoneselect