I would like the ability to export libraries into a .csv file
Please note the export option is only available while viewing all of your media, as it exports your complete library. In the screenshot you provided, you were viewing a specific playlist, rather than all of your media.
At this time, exporting a specific playlist is not available. However, that feature will be added soon.
The "Export" option is not visible.
You can now download your full media library to a .csv file.
1) Make sure you have either the "Global Accessibility" or the "Media & Playlists Accessibility Override" settings enabled. You can do this under Settings -> Accessibility Settings.
2) Click on "Media & Playlists" from the left hand menu. Click on "Export Library To .csv" in the table header.