Hi @Thomas Will
If you want to display the available count for a selected combination or attribute, it's not that simple. What you see in the detail is not the same template. It can be done via js or a custom hook.
Prestashop 1.6
find file: ./themes/default-bootstrap/js/product.js
find function: updateDisplay()
find query:
$('#quantityAvailable').text(quantityAvailable);
add your element:
$('#quantityAvailableBeforeQuantitySelected').text(quantityAvailable);
add to TPL: ./themes/default-bootstrap/product.tpl