If the SEO By 10Web plugin is not installed in your WP dashboard, go to the 10Web Dashboard and enable the SEO service. In your WP dashboard, go to SEO by 10Web, click on Sitemap. Go to the Exclude section. Here you can find the different sections of the sitemap that you can exclude from the sitemap. Under each title, click on the field and choose what you would like to exclude.
To exclude Archives from the Sitemap, click on the field under Exclude Archives, choose an archive to exclude, then Save the settings. The same steps apply for each section of the Excludes.