Currently the only adobe product listed on the allowed domains for embedding web content on a dashboard is Adobe XD, which is effectively being sunset.
We create a interactive content using Adobe InDesign, which can be published to https://indd.adobe.com/. It provides an iframe embed code, but Smartsheet does not recognize it.
In general, I would advocate for the web content to work with most of Adobe's embeddable content. Not sure why there is a limitation in this area.