$lookup across 2 databases

Working with Data
3

This is my pipeline

db.getSiblingDB("mai_inventory_service").view_product_hpp.aggregate([
    {
      $lookup: {
        localField: '_id',
        from: 'view_main_dealer_package_products',
        foreignField: 'product_id',
        as: 'package_product',
      }
    }
])