Yes! You can now add your "Newsletter Signup Form" on your Storefront.
To do so, go to your Account Details (avatar icon on the top right corner in your Artist Portal).
You will then have access to your Public Information and can enter the link to you Newsletter Signup Form. Click on "Save" once you're done.
You will now see a Newsletter icon on your Storefront (if active) where people visiting your page can subscribe or see your latest artistic news.