How do I search a SharePoint list from a Teams Tab?

Troy Fulkerson You're not missing anything: the Search function in Teams works (sort of - I've had issues with it not searching channel descriptions) across Teams, but not inside any tabbed SharePoint lists / Planner Plans, etc. This is most likely because the content in those tabs is simply loaded as a web page: the underlying data from Sharepoint isn't indexed in Teams. An example of this would be any list that is "special" like an Issues list: you can't even add them using the SharePoint widget, they have to be added as a Web Page by URL.

Ideally Microsoft will eventually redirect the search bar at the top to post your query to the current tab's search bar like how most browser address bars route a non-URL request to your specified search engine, but we're nowhere near there yet.

Planner is workable using filters since there's a generic keyword spot at the top of the filters. Sharepoint lists... not so much.