When your phone is set on Airplane mode, all radios inside the device are disabled. This prevents radio signals from possibly interfering with the equipment that pilots rely on while flying an airplane. Also known as Flight mode, or even offline mode, passengers on a plane can use this setting to access content already downloaded on a phone such as a movie, music, or a mobile video game.
With this new feature, a passenger in a plane won't have to do anything to keep his wireless Bluetooth earpods connected to his Android phone once forced to turn on Airplane mode. Otherwise, the user's wireless earpods will stop working until Bluetooth is separately enabled. It saves the user a little time and aggravation.

Context-aware Bluetooth airplane mode could be a new feature found in Android 11
Back in 2017 with iOS 11, Apple gave iPhone users the ability to keep Bluetooth and Wi-Fi enabled even when Airplane mode was turned on. This allows an iPhone user to keep his Apple Watch connected to his iPhone via Bluetooth even with the handset's internal radios shut down. And it also allows an iPhone user to stay connected to his AirPods when Airplane mode is enabled.ncG1vNJzZmivp6x7sbTOp5yaqpWjrm%2BvzqZmp52nqHyDuNSeq6inpJ16rrXGoatmq6SWxm6vzqelnpukmrFusdWepWavmJq7bo3Iq6elmZ6aeq67w55knqaRl7mmsIyipWZ5npm%2FsLXDZmhql5mZfnN8l3Bs