diff --git a/src/wp-admin/site-editor.php b/src/wp-admin/site-editor.php
index 3207bccdf2632..62229d8ed4db4 100644
--- a/src/wp-admin/site-editor.php
+++ b/src/wp-admin/site-editor.php
@@ -56,7 +56,16 @@ static function ( $classes ) {
 	$indexed_template_types[] = $template_type;
 }
 
-$block_editor_context = new WP_Block_Editor_Context( array( 'name' => 'core/edit-site' ) );
+$context_settings = array( 'name' => 'core/edit-site' );
+
+if ( ! empty( $_GET['postId'] ) ) {
+	$post_id = (int) $_GET['postId'];
+	if ( $post_id ) {
+		$context_settings['post'] = get_post( $post_id );
+	}
+}
+
+$block_editor_context = new WP_Block_Editor_Context( $context_settings );
 $custom_settings      = array(
 	'siteUrl'                   => site_url(),
 	'postsPerPage'              => get_option( 'posts_per_page' ),
@@ -118,6 +127,24 @@ static function ( $classes ) {
 	),
 );
 
+if ( $block_editor_context->post ) {
+	$route_for_post = rest_get_route_for_post( $block_editor_context->post );
+	if ( $route_for_post ) {
+		$preload_paths[] = add_query_arg( 'context', 'edit', $route_for_post );
+		if ( 'page' === $block_editor_context->post->post_type ) {
+			$preload_paths[] = add_query_arg(
+				'slug',
+				// @see https://github.com/WordPress/gutenberg/blob/489f6067c623926bce7151a76755bb68d8e22ea7/packages/edit-site/src/components/sync-state-with-url/use-init-edited-entity-from-url.js#L139-L140
+				'page-' . $block_editor_context->post->post_name,
+				'/wp/v2/templates/lookup'
+			);
+		}
+	}
+} else {
+	$preload_paths[] = '/wp/v2/templates/lookup?slug=front-page';
+	$preload_paths[] = '/wp/v2/templates/lookup?slug=home';
+}
+
 block_editor_rest_api_preload( $preload_paths, $block_editor_context );
 
 wp_add_inline_script(