STM32 LoRa Discovery Kit (B-L072Z-LRWAN1) on TTN US 915 Hybrid

Hi guys,
I am totally new to both STM32 LoRa Discovery Kit (B-L072Z-LRWAN1)
I have programed the node and it is running. I can view the message using Tera Term terminal.
I have also opened the LinkLabs gateway using the same terminal.

I can’t figure out how to see the STM32 device’s message on the gateway.
Can anyone help?

Margaret