Breely can sync with Google, Apple, or Office 365 calendars via the "Feature & Integrations" > "Calendar Syncing" section. If you have connected Breely to your Google calendar, events are added to your Google calendar.
To see your Google calendar events on your iPhone:
Sync Breely with Google Calendar under "Feature & Integrations" > "Calendar Syncing"
Connect your iPhone to your Google calendar.
Follow the instructions provided by Google on how to do this: https://support.google.com/calendar/answer/99358?co=GENIE.Platform%3DiOS&oco=0
First, ensure that your Google calendar is correctly displaying your events by checking it directly at https://calendar.google.com/.