If you picked up an older Fitbit for music playback, unfortunately, you're losing that option. The Google-owned brand will no longer support Deezer and Pandora on the Sense, Versa 2, and Versa 3. You won't be able to download Pandora stations or add Deezer playlists to your smartwatches. That means after March 31, Fitbit smartwatches lose the support for onboard music.
Controlling media from your phone is still possible. But this move does further cripple Fitbit's offerings. As The Verge pointed out, it looks like Google wants users to turn to the Pixel Watch as their smartwatch of choice.