Add Theme Support for Lazyload
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Caption: WordPress introduced native lazy loading support for images, videos, and iframes in version 5.5.
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Image description: WordPress introduced native lazy loading support for images, videos, and iframes in version 5.5.

An HTML sitemap is intended for users of your site. Generally, this type of sitemap provides links to the pages in your site, and may provide descriptions of those pages. We encourage the use of HTML sitemaps. They make it easier for users to navigate your site. Also, as we talk about in our webmaster guidelines, a clear hierarchy with text and links helps us index your site.