By default, Odoo doesn't offer the order-by feature in the Kanban view. However, the group-by feature can be used for a similar purpose. The drawback of this approach is that it hides the pipeline stages, as the pipelines are altered to reflect the group-by field name. Nevertheless, this method allows sorting records by dates close to the deadline or those that have already passed. The only downside to this option is that you need to check the stage by opening the record.(Check the screenshot attached below)

For development purposes, this code customization allows sorting records in the Kanban view based on the 'deadline' field in descending order. Please ensure that you thoroughly test these changes in a development environment before implementing them in a production system:

IN XML:

<odoo>

    <data>

        <record id="view_custom_kanban" model="ir.ui.view">

            <field name="name">Your Model Kanban View</field>

            <field name="model">your.model</field>

            <field name="inherit_id" ref="your_module.your_model_kanban_view"/>

            <field name="arch" type="xml">

                <xpath expr="//kanban" position="attributes">

                    <attribute name="default_order">deadline desc</attribute>

                </xpath>

            </field>

        </record>

    </data>

</odoo>

IN Py:

# your_model.py

from odoo import models, fields

class YourModel(models.Model):

    _name = 'your.model'

    _description = 'Your Model'

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

    deadline = fields.Datetime(string='Deadline')

    # ... other fields ...