Unless I'm not following the issue, I can't recreate the issue on my end. When I go to a /collections page and click on a product, I see everything that you're missing on your end.
Here's what I see on your product pages:
I have tested this throughout 3 different browsers and different screen sizes. All looks good.
Am I following this correctly? If not, please provide us a screen recording or something to get a better understanding.
Cal here from Shopify, thanks for reaching out to us. I'm in the same boat as Shay above, I can't seem to replicate your issue. If you provide some screenshots for us we might be able to better assist with this particular issue.