There are plenty of applications that you can use to create a playlist on Linux, but Clementine is a longstanding favourite media player that plenty of Linux users already rely on to play their music libraries.
Clementine makes constructing a new playlist very simple and exporting it for use on another device even easier.
This is a companion discussion topic for the original entry at https://linuxconfig.org/how-to-create-and-export-music-playlists-on-linux