After upgrading to Windows 11, you have Chat in the taskbar. This is really a Teams personal client, meaning that you end up with two Teams clients on the PC. To make life even more confusing, if you search Windows 11 for Teams, you see the personal version suggested first. Some pruning of clients is needed.
Windows 11 will include a consumer version of Teams, which looks as if it will be the first iteration of Teams 2.0, a new architecture which replaces Electron with Edge WebView2 as the basis for the Teams client. Microsoft predicts that the change will reduce the memory footprint by half and make it possible to introduce some new features. There’s no dependency between Windows 11 and Teams 2.0, but given the amount of work needed to make architectural transitions, it’s unlikely that we’ll see an enterprise Teams 2.0 client until sometime in 2022.