shipping_information_on_customer_invoice need testing

shipping_information_on_customer_invoice/__init__.py

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+from . import models

shipping_information_on_customer_invoice/__manifest__.py

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+{
+    'name': 'Shipping Information on Customer Invoice',
+    'version': '18.0.0.1',
+    'category': 'Accounting',
+    'summary': 'Add shipping carrier information on customer invoices',
+    'description': """
+        This module adds shipping carrier information to customer invoices:
+        * Carrier name
+        * Tracking number
+        * Billing mode
+    """,
+    'depends': ['account', 'delivery'],
+    'data': [
+        'views/report_invoice.xml',
+    ],
+    'installable': True,
+    'auto_install': False,
+    'license': 'LGPL-3',
+}

shipping_information_on_customer_invoice/models/__init__.py

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+from . import account_move

shipping_information_on_customer_invoice/models/account_move.py

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+from odoo import api, fields, models
+
+class AccountMove(models.Model):
+    _inherit = 'account.move'
+
+    def _get_delivery_info(self):
+        """Get the delivery information for the invoice."""
+        self.ensure_one()
+        if self.move_type != 'out_invoice':
+            return False
+        
+        deliveries = self.picking_ids.filtered(lambda p: p.carrier_id)
+        if not deliveries:
+            return False
+            
+        carrier = deliveries[0].carrier_id
+        return {
+            'carrier_name': carrier.name,
+            'tracking_ref': deliveries[0].carrier_tracking_ref or '',
+            'invoice_policy': dict(carrier._fields['invoice_policy'].selection).get(carrier.invoice_policy, carrier.invoice_policy),
+        }

shipping_information_on_customer_invoice/views/report_invoice.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <template id="report_invoice_document_inherit_shipping" inherit_id="account.report_invoice_document">
+        <xpath expr="//div[@id='informations']" position="inside">
+            <t t-if="o._get_delivery_info()">
+                <div class="col-auto col-3 mw-100 mb-2" name="shipping_info">
+                    <strong>Shipping Information:</strong>
+                    <p class="m-0">
+                        <strong>Carrier: </strong>
+                        <span t-esc="o._get_delivery_info()['carrier_name']"/>
+                    </p>
+                    <t t-if="o._get_delivery_info()['tracking_ref']">
+                        <p class="m-0">
+                            <strong>Tracking: </strong>
+                            <span t-esc="o._get_delivery_info()['tracking_ref']"/>
+                        </p>
+                    </t>
+                    <p class="m-0">
+                        <strong>Billing Mode: </strong>
+                        <span t-esc="o._get_delivery_info()['invoice_policy']"/>
+                    </p>
+                </div>
+            </t>
+        </xpath>
+    </template>
+</odoo>