Hello @ry001062402 ,

Refer this threads it might help you : 

https://www.servicenow.com/community/itsm-forum/annoucements-do-not-appear-in-any-portal/td-p/357959...

https://www.servicenow.com/community/developer-forum/announcements-are-not-showing-in-portal-even-th...

If this helps you then mark it as helpful and accept as solution .

Regards,

Aditya

ahoy @ry001062402,

isn't it possible that you have already dismissed that? you can try to impersonate for a random user to see whether it is displayed or not to validate the visibility..

And eventually make it undissmissable from the "Behaviour" tab:

or another thing @ry001062402: the start date/time.

You might be adding time in IST for example but the system time zone is in US... something like this.

Move the start date to yesterday to be sure it already passed.

We tried the same in our client instance and encountered the same issue. I also tried using the Repair Plugin, but it still isn't working. We might need to log a case with Now Support.