There are simply no common successors to HFP. There are a few handsets that use two A2DP streams, but that requires a lot of bandwidth and I don't think support is anywhere close to universal.
Bluetooth 5.2 adds BLE Audio which offers more flexibility. The LC3 codec is supported by Windows 11, Android 13, and Linux, and it significantly improves audio quality compared to the older codecs. I'm not so sure about hardware support in headphones, though.
Bluetooth 5.2 adds BLE Audio which offers more flexibility. The LC3 codec is supported by Windows 11, Android 13, and Linux, and it significantly improves audio quality compared to the older codecs. I'm not so sure about hardware support in headphones, though.