Control Center Tweak
There’s also a small tweak to the Volume bar in the iOS Control Center. Essentially, when you connect AirPods or various Beats headphones to your iPhone or iPad, the appropriate icon will show up on the volume indicator.
Previously, Apple did something similar to the actual volume HUD on the Home screen and within apps. When you paired a compatible device with your iPhone, an icon version of the device would show up on the indicator.