Index: src/js/_enqueues/wp/theme.js
===================================================================
--- src/js/_enqueues/wp/theme.js	(revision 53907)
+++ src/js/_enqueues/wp/theme.js	(working copy)
@@ -1694,7 +1694,7 @@
 	browse: function( section ) {
 		// Create a new collection with the proper theme data
 		// for each section.
-		if ( 'blockthemes' === section ) {
+		if ( 'block-themes' === section ) {
 			// Get the themes by sending Ajax POST request to api.wordpress.org/themes
 			// or searching the local cache.
 			this.collection.query( { tag: 'full-site-editing' } );
Index: src/wp-admin/theme-install.php
===================================================================
--- src/wp-admin/theme-install.php	(revision 53907)
+++ src/wp-admin/theme-install.php	(working copy)
@@ -90,7 +90,7 @@
 	 *
 	 * Possible hook names include:
 	 *
-	 *  - `install_themes_pre_blockthemes`
+	 *  - `install_themes_pre_block-themes`
 	 *  - `install_themes_pre_dashboard`
 	 *  - `install_themes_pre_featured`
 	 *  - `install_themes_pre_new`
@@ -99,7 +99,7 @@
 	 *  - `install_themes_pre_upload`
 	 *
 	 * @since 2.8.0
-	 * @since 6.1.0 Added `install_themes_pre_blockthemes` hook name.
+	 * @since 6.1.0 Added `install_themes_pre_block-themes` hook name.
 	 */
 	do_action( "install_themes_pre_{$tab}" );
 }
@@ -187,7 +187,7 @@
 		<ul class="filter-links">
 			<li><a href="#" data-sort="popular"><?php _ex( 'Popular', 'themes' ); ?></a></li>
 			<li><a href="#" data-sort="new"><?php _ex( 'Latest', 'themes' ); ?></a></li>
-			<li><a href="#" data-sort="blockthemes"><?php _ex( 'Block Themes', 'themes' ); ?></a></li>
+			<li><a href="#" data-sort="block-themes"><?php _ex( 'Block Themes', 'themes' ); ?></a></li>
 			<li><a href="#" data-sort="favorites"><?php _ex( 'Favorites', 'themes' ); ?></a></li>
 		</ul>
 
@@ -266,7 +266,7 @@
 	 *
 	 * Possible hook names include:
 	 *
-	 *  - `install_themes_blockthemes`
+	 *  - `install_themes_block-themes`
 	 *  - `install_themes_dashboard`
 	 *  - `install_themes_featured`
 	 *  - `install_themes_new`
@@ -275,7 +275,7 @@
 	 *  - `install_themes_upload`
 	 *
 	 * @since 2.8.0
-	 * @since 6.1.0 Added `install_themes_blockthemes` hook name.
+	 * @since 6.1.0 Added `install_themes_block-themes` hook name.
 	 *
 	 * @param int $paged Number of the current page of results being viewed.
 	 */