When a new calendar is created on ecloud, it is not automatically available on the phone. Here the process to sync it:

  1. From the device, open Settings > Accounts

  2. Tap on your device account (not the Contacts entry!)

  3. Tap Account Settings

  4. In the new Window, on your /e/ email address

  5. Go into Calendar tab

  6. Refresh the calendar list by clicking on the 3 dots button (to right) > Refresh calendar list

  7. When few seconds. Your new calendar is now available!

  8. The new calendar is also available in the Tasks app