Assistance Required for Displaying Cross-Sell Products and Modifying WooCommerce Page Content

Hello,

I am currently facing issues with displaying cross-sell products on my WooCommerce site, specifically on the product and cart pages. Despite configuring cross-sell products correctly in each product's settings, they do not appear on the site. Below are the details of the issue:

Cross-sell products have been properly configured in the "Linked Products" tab of each product.
I have tested different hooks, such as woocommerce_after_single_product_summary and woocommerce_after_main_content, but without success.
I have reviewed the single-product.php file, and it seems to include the necessary hooks.
I added manual tests and debug messages, but cross-sell products are still not displayed.
I also checked the cart page, but cross-sell products are not visible there either.
Questions and Requests for Assistance:

Could you please check if my theme's template is correctly set up to display cross-sell products on the product and cart pages?
Are there any specific configurations or options in WooCommerce or my theme that might prevent the display of cross-sell products?
How can I modify and customize the content of the single-product, shop, and category pages (such as the archive-product.php file or others) to add custom content or adjust the layout?
Thank you in advance for your assistance and expertise. Please let me know if you need any additional information.

Best regards,