Calendar View Showing All Project Completion Dates

You can create a new calendar and then set up the filters for items  you want to show on the calendar.  You can choose planned dates to show the end date.  Then under projects set up the filter to narrow down the projects you want to see on the calendar.  You can filter on actual completion date, team assigned to, project status, etc.  Then set the project labels to Project Name and that will appear on the calenar with a link to the project.

Yes, you can do this by creating a custom calendar 😊

https://experienceleague.adobe.com/docs/workfront-learn/tutorials-workfront/reporting/basic-reporting/creating-custom-calendars.html?lang=en