As above , my suggestion was to set up a text formula field with the html shown in my last post. This will render the associated web pager (from the {Link} field) in the iframe when the field is displayed.
In my test database, the <iframe> approach works - as <iframe> is a whitelisted html tag. Here is a screenshot of the field setting and a page displaying it:
I was able to make it work with text formula. The issue is that a document on word online is not allowed to display in an iframe if its not public. That’s why it was not working…
The iframe method works well, thanks for sharing @JulianKirkness - I hadn’t come across it before. I have been using the Google drive embed version for some years and thought others may find it of interest.