If Windows doesn't even show the "JL BR21" name and just says the device has malfunctioned, the issue is likely hardware-related:
YouTube, Zoom, music playback, gaming (with noticeable Bluetooth lag). jieli br21 driver windows 10
In this guide, we will explain exactly what the BR21 chip is, why Windows 10 struggles with it, and how to get your device working in minutes. If Windows doesn't even show the "JL BR21"
Sometimes, the driver is actually in the Microsoft Update Catalog, but Windows Update ignores it unless prompted. the issue is likely hardware-related: YouTube
Low-latency “Fast Stream” mode, LDAC/aptX codec selection, or the hardware buttons for PC audio controls.