Media Keys stopped working?[Play/pause,Next&Previous track keys]

[FrenchPress]

You do not have to go that extreme.
You could install XFCE desktop on top of Gnome and see if it helps.

How to change task bar menu type and more Zorin 16 pro

Yes, Lite PRo is XFCE4 desktop. The only question is if it will be XFCE 4.14 or 4.16. I suspect 4.16. But we can handle both. Per below: I have been running XFCE4 4.16 on Zorin OS 16 beta this entire time. It is available in the Testing branch.

This one solution is from 2019.
https://www.addictivetips.com/ubuntu-linux-tips/fix-media-keys-not-working-on-linux/