Fritz!Box 7330 no switch interface

Hey Guys,

I am new to OpenWRT and flashed my old Fritzbox 7330 with the 19.07.9 version since the 21 hase some problems.
My goal is to seperate my IOT devices in seperate vlans but I can't find the switch tab in interfaces.

Did I anything wrong? Are vlans not supportet by this device?

Thank you!