If you want to show your attribute above/below stock availability, You need to copy:
magento2Root/vendor/magento/module-catalog/view/frontend/templates/product/view/type/default.phtml
to
app/design/frontend/{Package}/{theme}/Magento_Catalog/templates/product/view/type/default.phtml
In the above file you already have $_product
object.
at the end of file, put below code to get your attribute:
<?php echo $_product->getAttributeText('lieferzeit'); ?>
-------OR------
<?php echo $_product->getLieferzeit(); ?>
-------OR------
<?php echo $_product->getData('lieferzeit'); ?>
Note:
- Use any one code from above
- I am assuming your attribute code is
lieferzeit
.