Rak wisgate edge lite 2 can use instead of repeater (relay)

I have draw a diagram there is a nod rak3172 modul and sending a message to gateway but this gateaway dont have any internet connection. So it should forward another gateaway far from 5km. after that this gateaway should forward this message to another. 3th one has internet connection and it will push to lorawan network such as TTN or AWS. how can i will succes this diagram.

that will use for mountains.