That is highly unlikely to be implemented. Obihai would have to add a s__tload of extra firmware to provide the USB networking stack and unique driver for every model of USB-attached network dongle or hotspot.
Instead: if you are using a hotspot that bridges LTE with WiFi instead of, or in addition to USB (or, for example, a LTE Android phone with tethering included in your plan), then all you need is an OBi WiFi dongle and an OBi 20x series box. Plug the OBiWiFi into the OBi, turn on your LTE<-->WiFi device, and you're all set.