Board Thread:Support Requests - Getting Technical/@comment-37280518-20200312151807/@comment-9605025-20200312154733

Are you talking about the Unified Community Platform? This is what communities created after March 10, 2020 use.

If so, I suggest you ask on this thread where staff (specifically MisterWoodhouse) are more likely to see your question. The new platform, though released yesterday for new wikis, is still under development and very little public documentation is available at this time. As it is new, most veteran users are no better off than new users with regards to navigating its features. Since it is still in development, it may not yet support infoboxes. The UCP does not have a "classic editor", just the new Visual Editor.

If you are not talking about UCP, then you should see an editing bar at the top of the VisualEditor. In that bar should be a drop-down menu that says "Insert". Click on that and the first option should be "Infobox". For classic editor, you should see some panels on the right of the editor. If you do not, there should be a small triangle just right of the editor's scroll bar. If you click the triangle, the panels should appear. There should be a panel called "Templates". You may need to click the panel to expand it.