diff --git a/src/wp-includes/collaboration.php b/src/wp-includes/collaboration.php
index 31f816c87b670..16392bc216e8b 100644
--- a/src/wp-includes/collaboration.php
+++ b/src/wp-includes/collaboration.php
@@ -34,3 +34,168 @@ function wp_collaboration_inject_setting() {
 		'after'
 	);
 }
+
+/**
+ * Modifies the post list UI and heartbeat responses for real-time collaboration.
+ *
+ * When RTC is enabled, hides the lock icon and user avatar, replaces the
+ * user-specific lock text with "Currently being edited", changes the "Edit"
+ * row action to "Join", and re-enables controls that core normally hides
+ * for locked posts (since collaborative editing is possible).
+ *
+ * @since 7.0.0
+ *
+ * @access private
+ *
+ * @global string $pagenow The filename of the current screen.
+ */
+function wp_post_list_collaboration_ui() {
+	global $pagenow;
+
+	if ( ! get_option( 'wp_enable_real_time_collaboration' ) ) {
+		return;
+	}
+
+	// Heartbeat filter applies globally (not just edit.php) since the
+	// heartbeat API can fire from any admin page.
+	add_filter( 'heartbeat_received', 'wp_filter_locked_posts_heartbeat_for_rtc', 20 );
+
+	// CSS, JS, and row action overrides only apply on the posts list page.
+	if ( 'edit.php' !== $pagenow ) {
+		return;
+	}
+
+	add_action( 'admin_head', 'wp_post_list_collaboration_styles' );
+	add_filter( 'gettext', 'wp_filter_locked_post_text_for_rtc', 10, 3 );
+	add_filter( 'post_row_actions', 'wp_post_list_collaboration_row_actions', 10, 2 );
+	add_filter( 'page_row_actions', 'wp_post_list_collaboration_row_actions', 10, 2 );
+}
+
+/**
+ * Filters the heartbeat response to remove user-specific lock information
+ * when real-time collaboration is enabled.
+ *
+ * WordPress core's wp_check_locked_posts() runs at priority 10 and populates
+ * the 'wp-check-locked-posts' key with user name, avatar, and text. This
+ * filter runs at priority 20 to replace that data with a generic message,
+ * preventing user-specific lock info from reaching the client.
+ *
+ * @since 7.0.0
+ *
+ * @access private
+ *
+ * @param array $response The heartbeat response.
+ * @return array Modified heartbeat response.
+ */
+function wp_filter_locked_posts_heartbeat_for_rtc( $response ) {
+	if ( ! empty( $response['wp-check-locked-posts'] ) ) {
+		foreach ( $response['wp-check-locked-posts'] as $key => $lock_data ) {
+			$response['wp-check-locked-posts'][ $key ]['text'] = __( 'Currently being edited' );
+			unset( $response['wp-check-locked-posts'][ $key ]['avatar_src'] );
+			unset( $response['wp-check-locked-posts'][ $key ]['avatar_src_2x'] );
+		}
+	}
+
+	return $response;
+}
+
+/**
+ * Outputs CSS to hide the post lock icon and user avatar in the post list
+ * when real-time collaboration is enabled.
+ *
+ * Also re-enables checkboxes and row actions that WordPress core hides for
+ * locked posts, since collaborative editing means the post is not exclusively
+ * locked.
+ *
+ * @since 7.0.0
+ *
+ * @access private
+ */
+function wp_post_list_collaboration_styles() {
+	?>
+	<style type="text/css">
+		/*
+		 * Hide the lock indicator icon in the checkbox column.
+		 * WordPress core shows it via .wp-locked .locked-indicator { display: block },
+		 * so we match that specificity to override it.
+		 */
+		.wp-locked .locked-indicator {
+			display: none;
+		}
+		/* Hide the user avatar in the locked info area. */
+		.wp-locked .locked-info .locked-avatar {
+			display: none;
+		}
+		/*
+		 * Re-enable controls that core hides for locked posts,
+		 * since RTC allows collaborative editing.
+		 */
+		.wp-locked .check-column label,
+		.wp-locked .check-column input[type="checkbox"] {
+			display: revert;
+		}
+		.wp-locked .row-actions .inline {
+			display: revert;
+		}
+	</style>
+	<?php
+}
+
+/**
+ * Filters the translation of the lock text to replace user-specific
+ * "%s is currently editing" with a generic "Currently being edited"
+ * message on initial page render.
+ *
+ * WordPress core outputs this text server-side in WP_Posts_List_Table.
+ * Using a gettext filter replaces it before it reaches the browser,
+ * avoiding a flash of the original text.
+ *
+ * @since 7.0.0
+ *
+ * @access private
+ *
+ * @param string $translation Translated text.
+ * @param string $text        Original text to translate.
+ * @param string $domain      Text domain.
+ * @return string Modified translation.
+ */
+function wp_filter_locked_post_text_for_rtc( $translation, $text, $domain ) {
+	if ( 'default' === $domain && '%s is currently editing' === $text ) {
+		return __( 'Currently being edited' );
+	}
+
+	return $translation;
+}
+
+/**
+ * Filters post row actions to change "Edit" to "Join" for locked posts
+ * when real-time collaboration is enabled.
+ *
+ * @since 7.0.0
+ *
+ * @access private
+ *
+ * @param string[] $actions An array of row action links.
+ * @param WP_Post  $post    The post object.
+ * @return string[] Modified row action links.
+ */
+function wp_post_list_collaboration_row_actions( $actions, $post ) {
+	if ( ! function_exists( 'wp_check_post_lock' ) ) {
+		require_once ABSPATH . 'wp-admin/includes/post.php';
+	}
+
+	$lock_holder = wp_check_post_lock( $post->ID );
+	if ( ! $lock_holder ) {
+		return $actions;
+	}
+
+	if ( isset( $actions['edit'] ) ) {
+		$actions['edit'] = preg_replace(
+			'/>Edit</',
+			'>' . esc_html__( 'Join' ) . '<',
+			$actions['edit']
+		);
+	}
+
+	return $actions;
+}
diff --git a/src/wp-includes/default-filters.php b/src/wp-includes/default-filters.php
index 24b808bf9cd17..2e94141c30a2e 100644
--- a/src/wp-includes/default-filters.php
+++ b/src/wp-includes/default-filters.php
@@ -800,6 +800,7 @@
 
 // Collaboration.
 add_action( 'admin_init', 'wp_collaboration_inject_setting' );
+add_action( 'admin_init', 'wp_post_list_collaboration_ui' );
 
 // Add ignoredHookedBlocks metadata attribute to the template and template part post types.
 add_filter( 'rest_pre_insert_wp_template', 'inject_ignored_hooked_blocks_metadata_attributes' );