Sure, and that works great when you are using Linux to run Docker as you have full control over the networking. For docker on macOS as the OP is using, you only

Sure, and that works great when you are using Linux to run Docker as you have full control over the networking. For docker on macOS as the OP is using, you only get a single network, and it is an emulated one using vpnkit into the VM. You can't attach a network adapter directly to the VM, which means the docker containers running inside the VM can't see the IoT devices.