The Calendar app allows schedule sharing among family members and provides an at-a-glance view of everyone’s schedule. You must connect to your Google calendar or Microsoft Office 365 calendar to use the Calendar app.
When user chooses to enable Google or Microsoft Office 365 calendar integration within Calendar, user's schedule from Google or Microsoft 365 syncs to Calendar calendar app and vice versa.
Through this integration, users can share there schedules from Google Calendar or Microsoft 365 by displaying it on the fridge screen, for a more communal family sharing experience.
On the Home screen, tap the Calendar app.
The design of the app and the controls may differ depending on your settings and software version. If you have deleted the app from the Home screen, tap Apps and then tap the app to add it back to the Home screen.

You can edit or delete an event that you created. However, you can only delete an event that you were invited to.