We need a Teams setting to force Office documents to by default open in the Office Desktop applications
Like the Link Handling setting in most Office desktop applications (i.e. File Menu => Options => Advanced => Link Handling)
Possibly don't limit functionality to traditional Office formats only, consider the same for web pages, pdfs, etc. open in Adobe Reader or Microsoft Edge (Chromium) or using the Edge WebView2 Control for a full user experience.
Teams is really bad in displaying and editing documents (word, ppt, xlsx). It is a huge mess and looses us a lot of time.