Comment 11 for bug 1866999

It happened to me too. Then, I discovered that my login to my google acct had "expired" (how does that happen?). I logged in again and then created a test event which got synced within one minute.

If you are looking at an Android phone/tablet that is not receiving the event that you created on Gnome, I suggest checking calendar.google.com. I've also had issues with my phone syncing with on-line for unknown causes, usually just delayed.