Yes, music is played via a 3.5mm stereo audio plug.

The celexon VR Glasses Expert - 3D Virtual Reality Glasses VRG 3 are compatible with many smartphones, including the iPhone, as long as the display measures between 3.5" and 5.7". As the iPhone 15 falls within this size range, it should work with the VRG 3 without any problems. Regarding the audio aspect: The glasses are equipped with detachable hi-fi headphones that ensure an optimal audiovisual experience. The sound is fed through a jack plug from the mobile, which ensures good audio quality.

It is used with the phone But with an iPhone it doesn't work very well

According to the data sheet, these virtual reality glasses are intended for mobile phones up to 5.7", so unfortunately they are not compatible with Realme 6 (6.5").