Web View of Office Documents as Tab
Specific ask... ability to 'Copy Link to Page' in OneNote and 'Add a Tab' > 'Website' in Teams to have a OneNote page pinned as a tab. More general ask... do this with ANY link (e.g. unrelated SharePoint site) to ANY Office document (Word, PowerPoint, Excel, OneNote, Visio). AFAIK, documents can only be pinned to tabs if you use the specific "tab app", which requires the file to exist within the Teams space.
Simon Cousins commented
I'd love this. We would pin organizational files (xls mostly) to tabs in relevant channels.