It’s simple, I was doing it wrong:
"Ok so you set the instagram element to be of type “post”, but only entered a profile address: “https://www.instagram.com/lode.r/”. This is not how it’s intended to work, and that’s why in the canvas you just see the placeholder.
You either enter a specific post such as https://www.instagram.com/p/BabrtoaBnQu/ or set the instagram type to “recent post” with index 0, to show the latest post.
Duncan"