I have two WiFi networks on the same radio. One private and the other for guests. The first one is on lan and the second one is guest.
Now configure an interface for this WiFi network and its Firewall rules without having put anything in option ifname 'name' and you see that it already has an IP.
And when doing the same in another occasion, but adding a name in option ifname 'name', it appears as having no IP and no client can connect.
And when doing the same in another occasion, but adding a name in option ifname 'name', it appears as having no IP and no client can connect.