This is a generalization, but these devices are very likely only tested until they barely work on Windows and Mac OS. And if they have to choose between a quick

This is a generalization, but these devices are very likely only tested until they barely work on Windows and Mac OS. And if they have to choose between a quick fix that makes it work on those two, and implementing the spec properly, they'll pick the first option. So it's on Linux to discover and work around all the brokenness (in the bluetooth host device as well as the speakers, phones, peripherals, etc...)