Hi @kare93!
As @omarelhawary says, since this isn’t a core feature of WooCommerce, it would require some custom coding to achieve, which is outside our scope of support. I am leaving this thread open for a bit to see if anyone can chime in to help you out.
Anyway, I found a couple of articles that could help with the code you need:
* https://stackoverflow.com/questions/63594263/how-to-add-product-skus-to-woocommerce-new-order-email-subject
* https://stackoverflow.com/questions/46117929/how-to-show-sku-with-product-title-in-order-received-page-and-email-order
For additional assistance on this topic, we recommend getting in touch with one of the customization experts listed on the WooCommerce Customizations Page; they can help you to create the code you need.
If you are into coding, you can visit the WooCommerce Facebook group or the #developers channel of the WooCommerce Community Slack, you could find help from the community of open-source developers for WooCommerce that hangs in there.
Also, searching online, it seems that you could achieve this with a third-party plugin like this.
You can find a code to display the product SKU on the new order email template in its documentation here: https://themes.email/woocommerce/product-skus-in-woocommerce-order-emails.html.
I hope this helps!