To edit and update Sitemap.xml in Magento 2, follow these steps:

Step 1. Log in to the Admin Panel.

Step 2. Go to Stores > Settings > Configuration > Catalog > XML Sitemap.

Step 3. Now, configure the settings for categories, products, and CMS pages.

Step 4. Go to Marketing > SEO & Search > Site Map to edit or update the sitemap.

Step 5. Save changes and verify the updated sitemap.

You can use our Magento 2 XML and HTML Sitemap Extension to edit and update the XML sitemap for your Magento 2 store.

Read this How to Generate HTML and XML Sitemaps in Magento 2 to setup this extension.

Here are the few more resource to help you get most out of this Magento 2 XML and HTML Sitemap Extension.

• How to Create Magento 2 XML Sitemap
• Benefits of XML and HTML Sitemap for Magento 2 Stores