pos/pos_picking_delayed/views/view_pos_config.xml

<?xml version="1.0"?>
<!-- Copyright 2018 - Today Sylvain LE GAL (https://twitter.com/legalsylvain)
     License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).-->

<odoo>

    <record id="view_pos_config_form" model="ir.ui.view">
        <field name="model">pos.config</field>
        <field name="inherit_id" ref="point_of_sale.view_pos_config_form"/>
        <field name="arch" type="xml">
            <field name="default_fiscal_position_id" position="after">
                <field name="picking_creation_delayed"/>
            </field>
        </field>
    </record>

</odoo>