Pocket Informant does not support showing "Free/Busy" status for people's calendars. If a shared calendar is synced to Pocket Informant with only "Free/Busy" access and not at the very least "Read Only" access, you will not see any events for that calendar.
Google Calendar Sync - I don't see events for Shared Calendars marked as "Free/Busy" access
Last Updated: 981d