Microsoft released Build 21370 on April 29 (local time) on the Windows Insider Preview Developer Channel. The big change is the addition of Bluetooth audio-related features to this build and the addition of support for AAC.
In Windows, the Bluetooth audio codec has been compatible with SBC and aptX until now. Of course, when you want to listen in high quality, there are aptX, but there are many headphones or earphones that do not support aptX. In the case of AirPods or AirPods Pro, aptX is not supported, and when used in Windows, it becomes SBC.
However, it supports AAC through a recent Insider preview. From now on, you can enjoy music with high quality sound even on AirPods. In addition, the selection of Bluetooth headphone equipment is also simplified. Until now, when Bluetooth headphones were connected, several items (Hands-Free AG Audio, Stereo) were added to the list of audio devices. These items are headsets that can also use microphones, and stereos are audio-only. However, in the latest build, there is only one choice, and it automatically changes depending on the purpose. Related information can be found here.