If you don't want a particular page to appear in search results, you can set it to be hidden in the page SEO settings.
Within the editor, open the SEO settings in the bottom-left and click on the page you want to hide. Then, simply enable the option Hide page from search results:
This way, a noindex tag will be added to your website, preventing the page from appearing in search engines.
Remember to save the changes and update your website.