In have just installed Zorin 16 on my PC which has a Gigabyte X570 Aorus Ultra system.
The audio icon is greyed out on the bottom right.
I have installed PulseAudio and that has not helped.
This did work last year when I had Zorin 15.3 installed.
I have never had audio problems before.
I dont know what you need to determine the issue for this.