I’d have to ask, they weren’t mine. But part of the problem was that it’s either high latency and no mic or very low quality both ways, neither very usable for video conferencing. Was fine on Windows. I’m sure their Thinkpad’s shitty Mediatek Bluetooth module didn’t help either.

You still will run into issues with certain Bluetooth headphones on Linux because they either need proprietary codecs that just aren’t available or fall back to really shitty ones. Not Linux’ fault, but users will only see (or hear) that it doesn’t work properly.