amboxes at the top of articles are grouped behind the "This page has some issues" element.
The 'small' variant of them, often used in sections are however fully hidden. An example of this is https://en.wikipedia.org/wiki/Category_of_being#Categorization_of_existence where the template {{Empty section}} is being used.
This is by design to avoid cluttering the reader experience and loading more elements on the page than absolutely necessary (have to think about lower-end device users and slow connections). I should also note that our data on reader patterns indicates that over half of users never scroll past the lead section of articles on the mobile site anyway, so I think for now the top-level issues flag is sufficient.
Reclassified closure as declined
I don't know. I find this somewhat shortsighted. If you ARE doing this, then do it only for phone sizes.
But the whole closure sounds a bit like: "Yes we know the boat is leaking, but people don't like being remembered about the fact that the boat is leaking, so lets just keep sailing and hope no one will notice until we crossed the ocean".
Another report, this time concerning tmbox being fully hidden:
https://en.wikipedia.org/wiki/Wikipedia:Village_pump_(technical)#Invisible_templates
To put it in a different way, ignoring problems like this, in this way, is what led to shit storms when MMV and the typography refresh finally went live. It's ill advised.