Eh... If your adversary can break modern bluetooth encryption, I probably... would not bet on this? I would think that with appropriate radio equipment you can probably pick up audio from many wired headphones.
bluetooth encryption has been broken before. "KNOB" (https://www.usenix.org/system/files/sec19-antonioli.pdf) was less than 5 years ago. The kind of equipment that could pick up the audio over a wired headset from across the room could probably pick up something from the speakers of wireless earbuds too.
