I’m assuming this is a question of how to make that.
I installed node-red-contrib-ttn module (settings->palette->install). Then you get the “TTN Uplink” node to the node sidebar. Just use like any node. Then just edit the app from node to set application and application key like on TTN.
You can also set additional parameters like filters or select which node you are interested in. If not set, node red takes all devices and fields.
Sorry, but in the picture, I do it by myself. I mean what are the steps from the device to ttn uplink node ex. (maybe wrong) data from device --> gateway–> ttn dashboard–>ttn uplink