Computer Headphone Volume

Hi Folks,
I’m new to Cubase and have downloaded Cubase 12 Elements. I recently downloaded track files from my Zoom HD 16. I downloaded them onto a project. I have audio from a new mac OS desktop running Ventura. Problem. I can hear the tracks in the computer jack headphones (getting an audio interface but don’t have it yet) but at a low level. I have the master, track and output faders all the way up. I have downloaded the tracks to Garage Band, Voice memo and headphone outputs from iphone, ipad, and files from garage band and voice memo sent to the computer all have regular volume levels. So my question is why is the output from the headphone jack from computer low? Why isn’t it as loud as outputs from simular devices? And any fixes?
Thanks, Tony