Great explanation, @BiancaKerchhoff !
Thanks for sharing the troubleshooting steps.

Another common issue I've encountered is related to Advanced Portal Navigation. Even when a topic is correctly configured, active, and has accessible connected content, it may not appear if the navigation hierarchy hasn't been synchronized.

In those cases, I usually check Employee Center > Advanced Portal Navigation, open the corresponding menu item, run Sync Hierarchy, and verify whether the generated navigation items are active.

Another thing worth checking, especially in the Brazil release, is the Enable User Criteria Check option at the taxonomy topic level. These criteria can restrict topic visibility independently of the connected content, including restrictions inherited from parent topics.

So, besides User Criteria Diagnostics, I'd recommend checking navigation synchronization and topic-level visibility settings. Both can save a lot of troubleshooting time when everything looks correct at the catalog item level.

https://www.servicenow.com/community/itsm-forum/taxonomy-topics-are-not-visible-on-employee-center-p...

https://www.servicenow.com/docs/r/employee-service-management/employee-experience-foundation/enable-...?

Thanks again for the detailed write-up!