I contacted Honor support via my Honor…
I contacted Honor support via my Honor phone asking why the system build in app FM Radio do not work when I follow their instruction to have a USB c for audio jack connect and it do not work. The support asked me to provided them a video recording and I need to have another audio to test. I found that this is unreasonable and only adding problems to customer but not direct helping customer to sort out the problem. Finally, I may found the answer, The Honor lite 400 model does not support FM radio hardware, so the app will not function. I do not know why the Honor support could not tell me directly if this is the case?