I just want to point out: As recently as Dec 20, 2023, I could reorder tracks on a Playlist within the Apple Music Preview app on Windows 11. This functionality stopped working for me two days later on Dec 22, 2023. I am not sure if an update or upgrade to the Apple Music Preview app for Windows 11 was automatically installed between Dec 20, 2023 & Dec 22, 2023 . . . or if some change was pushed to the app without any upgrade.
One thing that I am certain about: Once I realized on Dec 22, 2023 that I lost this functionality [lost the ability to reorder tracks on a Playlist], my app version was (1.1028.8450.0), or build 1.1028.8450.0 -- the same version as lucius68.