pos/pos_session_summary/views/pos_session_view.xml

<?xml version="1.0"?>
<!--
    Copyright (C) 2016-Today: La Louve (<http://www.lalouve.net/>)
    @author: Sylvain LE GAL (https://twitter.com/legalsylvain)
    License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
-->

<odoo>

    <record model="ir.ui.view" id="view_pos_session_tree">
        <field name="model">pos.session</field>
        <field name="inherit_id" ref="point_of_sale.view_pos_session_tree"/>
        <field name="arch" type="xml">
            <field name="stop_at" position="after">
                <field name="order_qty" />
                <field name="total_amount" />
            </field>
        </field>
    </record>

    <record model="ir.ui.view" id="view_pos_session_form">
        <field name="model">pos.session</field>
        <field name="inherit_id" ref="point_of_sale.view_pos_session_form"/>
        <field name="arch" type="xml">
            <field name="config_id" position="after">
                <field name="order_qty" />
                <field name="total_amount" />
            </field>
            <field name="total_entry_encoding" position="replace">
                <field name="total_entry_encoding_sales" />
                <field name="total_entry_encoding_cash" />
            </field>
        </field>
    </record>

</odoo>