Simple task. I uploaded an audio file of a meeting to iCloud Drive (part of my trial in using an iPhone as my primary driver). On the Files app on my iPhone, the audio file is there, but when I tap on it, nothing. I cannot preview nor play it. So... how is this useful? How does this work? Microsoft OneDrive has a built-in viewer. But iCloud/Files app don't? How do I view that file on my phone then? Am I missing something here?