themes-wordpress/blockbase/block-templates/singular.html

<!-- wp:template-part {"slug":"header","tagName":"header"} /-->

<!-- wp:group {"layout":{"inherit":true},"className":"post-header"} -->
<div class="wp-block-group post-header">
<!-- wp:post-title /-->
</div>
<!-- /wp:group -->

<!-- wp:group {"tagName":"main","layout":{"inherit":true}} -->
<main class="wp-block-group post-content">
<!-- wp:post-featured-image {"align":"full"} /-->

<!-- wp:post-content /-->
</main>
<!-- /wp:group -->

<!-- wp:group {"layout":{"inherit":true}} -->
<div class="wp-block-group"><!-- wp:post-comments /--></div>
<!-- /wp:group -->

<!-- wp:template-part {"slug":"footer","tagName":"footer","layout":{"inherit":true},"className":"site-footer-container"} /-->