The latest Nothing OS update (1.1.4 and above) integrates the Nothing X app in Device Details. To access: 1. Connect an Ear (1) or Ear (stick) to your phone first. 2. Long press the Bluetooth button on Quick Settings. Or open "Settings - Connected Device". 3. Tap on the "Gear" icon on the connected Nothing earbuds. Here you can access all the features of Nothing's earbuds via the Nothing X app.
If you are on OS 1.1.4 or higher, and already have the Nothing X app, the icon will be hidden and all settings and features will be automatically integrated into Device Details.