The requirement is to show the partner tags on a sales order.
This is quite simple to do in Odoo Studio, but there are a couple of things to note.
- Drag the “Related Field” button on to your Form View
- Select Customer > Tags
- Make changes as shown below:
- Change label and / or field name (optional)
- Select the “many2many tags” widget
The screen should look like this if the partner (customer) has tags setup: