iOS 18.4: Access Hidden Ambient Music Playlists

In Apple's iOS 18.4 software update, there's a new Ambient Music feature available in the Control Center options on iPhone. It's free to use, and does not require an Apple Music subscription. It's also more customizable than most users probably realize. Keep reading to learn how.
There are four different sound categories to Ambient Music, including Sleep, Chill, Productivity, and Wellbeing. You can add each category individually to your Control Center, and then tap on one to start a playlist of