Many models of hearing aids use BT for volume and profile control. Some models may require external phone or audio adapters, but they are perfectly capable of streaming audio from just about any source. Unfortunately, the sound quality is not that great for music. Voice (telephone calls) works great.
BTW, one thing that you have to get used to with behind the ear models of hearing aids is that they are very good at picking up sound from BEHIND you. Better units use two or more microphones to help reduce the effect, but you quickly discover that you can hear people talking behind you with great clarity. I’m continually (and inconveniently) eavesdropping on the people at the tables behind me in restaurants, people behind me standing in line, people at airports in the waiting area seated behind me, and so forth. In fact, it is a challenge to concentrate on what my friends are saying to me from the front because of the distraction. I feel like Prof X hearing the thoughts of others as I try to hold a normal conversation.