Reply To: Upsell products not showing up on my product page

Hello,

Navigate to the Theme Settings > Product page > hide and show elements, make sure you have not set to show the Up-Sells in the sidebar.

If you have not, deactivate the plugins not related to the theme and check the issue.

Please refer this documentation and make sure you have configured everything correctly https://docs.woocommerce.com/document/related-products-up-sells-and-cross-sells/

Best Regards