Now work together with a that has been working with the IoT Cube. Try together to receive data from the IoT Cube. Here you can find some help to do that.
ttn/v3/app-iot-wuerfel-klassensatz-c@ttn/devices/eui-2023-c-01/up
Now you should be able to receive any data from the IoT Cube in the doll's house.