I see. There is a difference with the tutorial, then.
Instead of being added like any other feature (called “Products” in the UI) from the Dashboard it is now requested from the “Request” section of the “App Review” menu. You select the feature and submit it to review.
Which makes the process kind of loophole-ish because they request a link with a valid oEmbed to approve it… but it doesn’t work because the feature isn’t approved… 