I have Added Extra fields to the /17.0/addons/product/models/product_template .py
and to the product template view too and was able to display it.
The problem is that I want to display it by adding it in the /odoo-/17.0/addons/point_of_sale/views/report_saledetails.xml
But the error is saying I should add the field to the model of report_saledetails.xml which I can't figure out.