We are using your RAK7243 with Shirpstack local, works fine!
Our new installation concerns irrigation control.
Several nodes are installed at 3 kms from the gateway, and communicate perfectly.
Another field is only 700 m from gateway, but separated by a row of trees, and we have no communication.
Do you have a LoRa relay or repeater that would solve our problem ?
Another solution (without cutting all the trees ;-))?