I found this thread and I also have the same problem: I can't see the wifi icon on the lower right part of the laptop nor the wifi settings; just "Network" and "Bluetooth".
Today, I took the leap of faith to wipeout my Windows 10 OS laptop to Zorin Core OS 16. The wifi internet was working smoothly.
My laptop does not have a ethernet cable port.
I followed each step in this thread and would not get the wifi icon to appear.