separate pivot model for each approach

src/Database/Models/TenantMorphPivot.php

@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Stancl\Tenancy\Database\Models;
+
+use Illuminate\Database\Eloquent\Relations\MorphPivot;
+use Stancl\Tenancy\Contracts\Syncable;
+
+class TenantMorphPivot extends MorphPivot
+{
+    public static function booted(): void
+    {
+        static::saved(function (self $pivot) {
+            $parent = $pivot->pivotParent;
+
+            if ($parent instanceof Syncable && $parent->shouldSync()) {
+                $parent->triggerSyncEvent();
+            }
+        });
+    }
+}