Hi,
Since this is a custom board, I recommend running a simple example first such as the gpio_led_output and verify that everything works as expected. Then run a BLE example and verify that the code is executing correctly without any errors.
Then please check that when advertising is started, the gAdvertisingStateChanged_c event, is being triggered in the BleApp_AdvertisingCallback(). If this event is triggered, this means that as far as the QN908x knows, it is advertising correctly, but if you are not able to see the advertisement packets with a scanning device, the problem can be due to poor RF performance with your custom board. If that's the case, please follow the recommendations from the app note AN11996 - QN908x Hardware Design Considerations and make sure you follow the layout from the QN9080DK as closely as possible.
Best regards,
Gerardo
