app-odoo/app_module_searchpanel/views/module_views.xml

<odoo>
    <data>
        <!-- module -->
        <record id="app_module_view_kanban" model="ir.ui.view">
            <field name="name">Apps Kanban searchpanel</field>
            <field name="model">ir.module.module</field>
            <field name="inherit_id" ref="base.module_view_kanban"/>
            <field name="arch" type="xml">
                <xpath expr="//templates">
                    <searchpanel>
                        <field name="category_id"/>
                    </searchpanel>
                </xpath>
            </field>
        </record>
    </data>
</odoo>