By default, Magento uses the same template for product related, upsell, crosssel and new products content widget. This template comes from vendor/magento/module-catalog/view/frontend/templates/product/list/items.phtml.

If we want custom this template, we should copy this template to our current them: app/design/frontend/{Vendor Theme}/{Theme name}/Magento_Catalog/templates/product/list/items.phtml.

By default, Magento uses the same template for product related, upsell, crosssel and new products content widget. This template comes from vendor/magento/module-catalog/view/frontend/templates/product/list/items.phtml.

If we want to custom this template, we should copy it to our current theme: app/design/frontend/{Vendor Theme}/{Theme name}/Magento_Catalog/templates/product/list/items.phtml.