adsoma Apologies for the delayed response — this one slipped past me somehow.
I’ve identified the reason why the gallery wasn’t displaying on the Test2 page. Since the page is using a different component (not JA Builder), it loads the main content block. However, it was set to display a module position, which had no content — so nothing appeared.
I’ve updated the page to load the component output (main content block) again, and the gallery is now displaying correctly.

Please check it on your end and let me know if everything looks good.