Zoom Makes Phone Audio Very Quiet When Playing Music

[kyla12345]

Hi! I have some clients on Zoom who only have access to a phone and I need to be able to hear them and a music track they play at the same time. I can hear both them and the track just fine, but the music becomes super quiet on their end so it's very hard for them to hear anything that isn't me. Is there a way to bypass this? These clients are using an iPhone.