Current Problem: iFraming external PDFs (with embed src file link) is Unavailable
While trying to embedding/iframing PDF files into Obsidian, it shows nothing but a blank frame in the preview mode - a blank element in the iframe html elements.
The following is the inspection of elements in dev mode.
iframe code used for example
<iframe src="https://d30b7srod7pe7m.cloudfront.net/uploads/2020/08/Figure_Managing-acute-asthma-in-adults_web.pdf"></iframe>
Proposed Solution
Hoping Obsidian could be as able to render out the elements in PDF files, just as web browsers does in comparison: