I'm trying to show 3 columns in a treeview. But somehow it's only showing one column. (The Model name column)

This is my treeview xml record:  

<record id="model_tree_view" model="ir.ui.view">
    <field name="name">car.model.tree</field>
    <field name="model">car.model</field>
    <field name="arch" type="xml">
        <tree string="Models">
            <field name="brand_name"/>
            <field name="name"/>
            <field name="description"/>
        </tree>
    </field>
</record>

And this is my model class:  

from odoo import fields, models


class CarModel(models.Model):
    _name = "car.model"
    _description = "Car Model Table"

    name = fields.Char(string="Model name", required=True)
    description = fields.Text(string="Description")

    brand_name = fields.Many2one('car.brand', 'Brand name')

Checked __manifest__.py and also security csv and everything seems correct.

I'm working with Odoo version 13.0 Community Edition.

(Question also asked on StackOverflow: https://stackoverflow.com/questions/64113753/odoo-column-is-not-showing)