How to Show a Progress Bar in Odoo Kanban View (Odoo 16–19)

<record id="view_my_model_kanban" model="ir.ui.view">
    <field name="name">my.model.kanban</field>
    <field name="model">my.model</field>
    <field name="arch" type="xml">
        <kanban>

            <!-- Step 1: Declare the fields the kanban needs -->
            <field name="name"/>
            <field name="state"/>
            <field name="priority"/>

            <!-- Step 2: Add the progressbar element.
                 Place it as a direct child of <kanban>, before <templates>. -->
            <progressbar
                field_value="state"
                colors='{"draft": "muted", "in_progress": "warning", "done": "success", "blocked": "danger"}'
            />

            <!-- Step 3: Kanban card template -->
            <templates>
                <t t-name="kanban-box">
                    <div class="oe_kanban_global_click">
                        <div class="oe_kanban_details">
                            <strong class="o_kanban_record_title">
                                <field name="name"/>
                            </strong>
                        </div>
                    </div>
                </t>
            </templates>

        </kanban>
    </field>
</record>

<kanban>
    <field name="name"/>
    <field name="state"/>
    <field name="expected_revenue"/>  <!-- must be declared here -->

    <progressbar
        field_value="state"
        colors='{"new": "muted", "in_progress": "warning", "won": "success", "lost": "danger"}'
        sum_field="expected_revenue"
    />

    <templates>
        <t t-name="kanban-box">
            <div class="oe_kanban_global_click">
                <strong><field name="name"/></strong>
                <div class="oe_kanban_bottom_right">
                    <field name="expected_revenue" widget="monetary"/>
                </div>
            </div>
        </t>
    </templates>
</kanban>

from odoo import models, fields

class MyModel(models.Model):
    _name = 'my.model'
    _description = 'My Model'

    name = fields.Char(string='Name', required=True)

    # Selection field — values must match the keys in the progressbar colors attribute
    state = fields.Selection(
        selection=[
            ('draft', 'Draft'),
            ('in_progress', 'In Progress'),
            ('done', 'Done'),
            ('blocked', 'Blocked'),
        ],
        string='Status',
        default='draft',
    )

    # Optional: numeric field for sum_field
    expected_revenue = fields.Monetary(
        string='Expected Revenue',
        currency_field='currency_id',
    )
    currency_id = fields.Many2one(
        'res.currency',
        default=lambda self: self.env.company.currency_id,
    )

<!-- ir.actions.act_window — set default grouping so the progressbar appears -->
<record id="action_my_model_kanban" model="ir.actions.act_window">
    <field name="name">My Model</field>
    <field name="res_model">my.model</field>
    <field name="view_mode">kanban,list,form</field>
    <!-- group_by stage_id so the Kanban columns + progressbar are visible by default -->
    <field name="context">{"default_stage_id": 1, "search_default_group_by_stage_id": 1}</field>
</record>

<!-- Or group by the state selection field directly: -->
<field name="context">{"search_default_group_by_state": 1}</field>

<!-- Inherit an existing kanban view and add a progressbar -->
<record id="view_sale_order_kanban_inherit_progressbar" model="ir.ui.view">
    <field name="name">sale.order.kanban.progressbar</field>
    <field name="model">sale.order</field>
    <field name="inherit_id" ref="sale.view_sale_order_kanban"/>
    <field name="arch" type="xml">

        <!-- Insert the progressbar before the <templates> element -->
        <xpath expr="//kanban/templates" position="before">
            <progressbar
                field_value="state"
                colors='{"draft": "muted", "sent": "warning", "sale": "success", "cancel": "danger"}'
                sum_field="amount_total"
            />
        </xpath>

        <!-- Ensure the fields needed by progressbar are declared -->
        <xpath expr="//kanban/field[@name='name']" position="after">
            <field name="amount_total"/>
        </xpath>

    </field>
</record>