We have recently upgraded our system from odoo 15 to odoo 16 and are encountering some issues with the reports. Our custom module, designed to modify the report template of the "account" application for invoicing (adjusting font style, size, arrangement of text blocks, and the layout of invoice data tables), no longer applies the predefined layout correctly post-upgrade. Moreover, despite assigning German as the preferred language for some clients, the system defaults to English for invoices. The customization in question involves QWeb views to generate PDFs from the invoice data.
Is there anything like a changelog or documentation that could help us identify the necessary adjustments to our custom module or odoo itself. Our goal is to restore the QWeb report's structure and presentation to its intended design, aligning with the functionality we had in odoo 15.