Documentation says VictronConnect running on iOS (iPhone or iPad) can not access VE.Bus devices because the iOS device does not have a USB port. However there are adapters that provide a USB output from an iOS device: Apple Lightening to USB Camera Adapter and Lightening to USB 3 Camera Adapter for iPhones and iPads with Lightening connectors, and the Apple USB-C to USB Adapter and Apple USB-C AV Multiport Adapter. The Apple Lightening to USB 3 Camera Adapter and Apple USB-C AV Multiport Adapter both have power through connector. There are many third party adapters as well.
I suggest VictronConnect be updated to allow iOS devices to access VE.Bus devices.