Hello,

1) “New” label is applied to the products which are set as new on the product page settings https://xtemos.com/docs/woodmart/product-page-options/#local_settings

2) You can choose any HTML block as the product extra content area by editing the products. And sorry the HTML block code for the extra product content of the product you mentioned is not available.

If you are trying to ask anything else then please provide some relevant screenshots of the specific area with the URL of the page where you added the button to check it myself and help you out accordingly.

Regards.
Xtemos Studios