From email:> On February 24, 2021, we will delete all of your Google Play Music data. This includes your music library with any uploads, purchases and anything you've added from Google Play Music. After this date, there will be no way to recover it.
You can download your Google Play Music library and data with Google Takeout or transfer it to YouTube Music. As a reminder, with one click you can still transfer your music library, including uploads, playlists, and recommendations, to YouTube Music before February 24, 2021.