@Stephaniew there isn’t such a functionality in Klaviyo as in a specific catalog-aware trigger against new products added. Maybe its something possible within Shopify flows? Even if it was possible who did you wish for it to send emails to, everyone subscribed to the newsletter? As you can see its not as cut and dry as back in stock or price drop triggers that rely on user subscribing or having viewed the product to be eligible for entering the flow.
— Jad A | Klaviyo + Shopify + API Integrations Specialist • 7+ Years' Experience Helping with new setups, seamless integrations, and API connections—happy to connect. http://ja-technical-consulting.xyz/