How to show network on finder

Hallo

I want to ask about locations > network, how to show network in finder?

I try with other mac in same wifi/hotspot, but in my macbook air not show in the finder option for network.

But with my macbook pro it show in finder option for network without I do anything and I can see content of my macbook air, and without password just see all of my macbook air.

Thank You