Lossless music on iPhone 6s headphone jack
Can I play lossless music on my wired headphones connected to my iPhone 6s' 3.5mm audio jack at a rate of up to 24-bit/48 kHz?
iPhone 6s Plus, iOS 14
Yes. For details and requirements and settings, tap or click on the following blue-text link > About lossless audio in Apple Music - Apple Support