diff --git a/includes/Core/Tags/First_Party_Mode/First_Party_Mode.php b/includes/Core/Tags/First_Party_Mode/First_Party_Mode.php
index aa187795520..85463c7958b 100644
--- a/includes/Core/Tags/First_Party_Mode/First_Party_Mode.php
+++ b/includes/Core/Tags/First_Party_Mode/First_Party_Mode.php
@@ -11,6 +11,7 @@
 namespace Google\Site_Kit\Core\Tags\First_Party_Mode;
 
 use Google\Site_Kit\Context;
+use Google\Site_Kit\Core\Modules\Module_With_Debug_Fields;
 use Google\Site_Kit\Core\Storage\Options;
 use Google\Site_Kit\Core\Util\Method_Proxy_Trait;
 
@@ -21,7 +22,7 @@
  * @access private
  * @ignore
  */
-class First_Party_Mode {
+class First_Party_Mode implements Module_With_Debug_Fields {
 	use Method_Proxy_Trait;
 
 	/**
@@ -72,4 +73,23 @@ public function register() {
 		$this->first_party_mode_settings->register();
 		$this->rest_controller->register();
 	}
+
+	/**
+	 * Gets an array of debug field definitions.
+	 *
+	 * @since n.e.x.t
+	 *
+	 * @return array
+	 */
+	public function get_debug_fields() {
+		$settings = $this->first_party_mode_settings->get();
+
+		return array(
+			'first_party_mode_is_enabled' => array(
+				'label' => __( 'First-Party Mode: Enabled', 'google-site-kit' ),
+				'value' => $settings['isEnabled'] ? __( 'Yes', 'google-site-kit' ) : __( 'No', 'google-site-kit' ),
+				'debug' => $settings['isEnabled'] ? 'yes' : 'no',
+			),
+		);
+	}
 }
diff --git a/includes/Modules/Ads.php b/includes/Modules/Ads.php
index 06c2b0f0a43..2247af589dd 100644
--- a/includes/Modules/Ads.php
+++ b/includes/Modules/Ads.php
@@ -28,6 +28,7 @@
 use Google\Site_Kit\Core\Modules\Tags\Module_Tag_Matchers;
 use Google\Site_Kit\Core\Permissions\Permissions;
 use Google\Site_Kit\Core\Site_Health\Debug_Data;
+use Google\Site_Kit\Core\Tags\First_Party_Mode\First_Party_Mode;
 use Google\Site_Kit\Modules\Ads\PAX_Config;
 use Google\Site_Kit\Modules\Ads\Settings;
 use Google\Site_Kit\Modules\Ads\Has_Tag_Guard;
@@ -307,13 +308,24 @@ public function register_tag() {
 	public function get_debug_fields() {
 		$settings = $this->get_settings()->get();
 
-		return array(
+		$debug_fields = array(
 			'ads_conversion_tracking_id' => array(
 				'label' => __( 'Ads: Conversion Tracking ID', 'google-site-kit' ),
 				'value' => $settings['conversionID'],
 				'debug' => Debug_Data::redact_debug_value( $settings['conversionID'] ),
 			),
 		);
+
+		// Add fields from First-Party Mode.
+		// Note: fields are added in both Analytics and Ads so that the debug fields will show if either module is enabled.
+		if ( Feature_Flags::enabled( 'firstPartyMode' ) ) {
+			$first_party_mode             = new First_Party_Mode( $this->context );
+			$fields_from_first_party_mode = $first_party_mode->get_debug_fields();
+
+			$debug_fields = array_merge( $debug_fields, $fields_from_first_party_mode );
+		}
+
+		return $debug_fields;
 	}
 
 	/**
diff --git a/includes/Modules/Analytics_4.php b/includes/Modules/Analytics_4.php
index 094ab1e07a4..6d952a3cfc9 100644
--- a/includes/Modules/Analytics_4.php
+++ b/includes/Modules/Analytics_4.php
@@ -89,6 +89,7 @@
 use Google\Site_Kit_Dependencies\Google_Service_TagManager_Container;
 use Google\Site_Kit_Dependencies\Psr\Http\Message\RequestInterface;
 use Google\Site_Kit\Core\REST_API\REST_Routes;
+use Google\Site_Kit\Core\Tags\First_Party_Mode\First_Party_Mode;
 use Google\Site_Kit\Modules\Analytics_4\Conversion_Reporting\Conversion_Reporting_Cron;
 use Google\Site_Kit\Modules\Analytics_4\Conversion_Reporting\Conversion_Reporting_Events_Sync;
 use Google\Site_Kit\Modules\Analytics_4\Conversion_Reporting\Conversion_Reporting_Provider;
@@ -593,6 +594,15 @@ public function get_debug_fields() {
 			);
 		}
 
+		// Add fields from First-Party Mode.
+		// Note: fields are added in both Analytics and Ads so that the debug fields will show if either module is enabled.
+		if ( Feature_Flags::enabled( 'firstPartyMode' ) ) {
+			$first_party_mode             = new First_Party_Mode( $this->context );
+			$fields_from_first_party_mode = $first_party_mode->get_debug_fields();
+
+			$debug_fields = array_merge( $debug_fields, $fields_from_first_party_mode );
+		}
+
 		return $debug_fields;
 	}