app-odoo/app_purchase_searchpanel/views/purchase_views.xml

<odoo>
  <data>
    <record id="app_view_purchase_order_kanban" model="ir.ui.view">
        <field name="name">app.purchase.order.kanban</field>
        <field name="model">purchase.order</field>
        <field name="inherit_id" ref="purchase.view_purchase_order_kanban"/>
        <field name="arch" type="xml">
            <xpath expr="//templates">
                <searchpanel>
                    <field name="partner_id"/>
                </searchpanel>
            </xpath>
        </field>
    </record>
      <!-- price list -->
    <record id="app_product_supplierinfo_view_kanban" model="ir.ui.view">
        <field name="name">app.product.supplierinfo.kanban</field>
        <field name="model">product.supplierinfo</field>
        <field name="inherit_id" ref="product.product_supplierinfo_view_kanban"/>
        <field name="arch" type="xml">
            <xpath expr="//templates">
                <searchpanel>
                    <field name="name"/>
                </searchpanel>
            </xpath>
        </field>
    </record>
  </data>
</odoo>