Right click the VS 2017 (community) taskbar icon and you see recent solutions. You could launch VS in a particular solution by clicking the solution name. With VS 2019, that no longer happens. All you see is launch VS 2019 and unpin from taskbar. I found the 2017 way to be convenient and quicker. Is there a way to enable it in VS 2019?
Also, I don't have a clue about how to use tags.