You’ll need an Apple lightning to USB 3 camera adapter, and one of the supported ethernet adapters from this list:
These are some of the USB ethernet adapters that you can use with Apple USB 3 Camera Adapter:
(Apple)
- Apple USB Ethernet Adapter
- Buffalo LUA-U2-GT
- Linksys USB200M
- Linksys USB1000
- IO-Data ETG-US2
- Belkin F5D5055