You used to be able to invert date added to get most recent adds to playlists. Now you have to scroll all the way to the bottom to get recently added songs, why!!?!. This is such a simple fix. For playlists of 100s of songs, why would you want your user to have to scroll manually all the way down?
Thanks for reaching out about this here on the Community. We're happy to shed some light on the situation.
If you can't see theDATE ADDEDcolumn, then you probably have the app open in a downsized window. You can either make it bigger / maximize it until the column shows up or try zooming out (3-dot menu > View > Zoom Out) if you prefer to keep the size of the window.
In case this doesn't work for you, we'd recommend following the steps here for a clean reinstall to be sure that you have the latest version.
If you want to learn more about the New Desktop App, we recommend checking out the FAQ here.
Hope this helps. Let us know how you get on and give us a shout if there's anything else you need a hand with.