LoRa forwarding interface

Hello,
I am working on Mikrotik LtAP LR8
I am trying to forward LoRaWAN frames to my LoRa network server through OVPN. Currently it is working, BUT, I want it to communicate by LTE instead of ethernet.
How to force it to communicate with my LoRa network server only using LTE through OVPN instead of ethernet ?
Thank You

You can set up a simple LoRa node as a single-channel gateway. That way multiple devices can connect to the same gateway. Lots of examples and resources via google.
The other way is to buy a cheap multi-channel gateway and connect to The Things Network, thereby expanding the network for your nearby community.
Hope this resolves your problem.