Maybe that's a stupid question and just to keep things organized on my AP, but I have to create two different zones for the same lan interface, but I can't via LuCi:
It does not make much sense to have multiple zones covering the same interface. If you want to allow traffic forwarding from LAN to the IOT zone then simply create a traffic rule for src lan, dest iot, protocol any, action accept.
Yes yes it was just to keep things more readable, I have alredy tons of rules... anyway thanks, but it's also weird that if I change the name in LuCi of the rule (not the zone), then it remains the same. Maybe the classical red alert would be more clear.