I am creating an app with quite a long form where I would like a gallery in the middle of the form that can be used to update a separate Sharepoint list. In know this is not best practice to put a gallery within a datacard but I feel as it is my best option to allow the gallery to scroll with the form.
(If someone has a better solution where gallery sits outside the form and is still fixed to the position on the form then I would love to hear it. You can lock to a position on screen but not a position within the form)
The Galley is displayed when I am creating the app but when I play the app the gallery is not shown.

When the app is played

I have actually performed this before in another app no problem and I have read others have also.