Hi,

In the default feature of the customer notes initial notes are applied in the pos invoice view, and we can see the particular notes under the invoice lines. if you need to record those notes under the order lines we can customize the orderliness and we can update the record there.

You can inherit the orderlines 

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

            <field name="name">view.pos.order.lines.form.inherit</field>

            <field name="model">pos.order</field>

            <field name="inherit_id" ref="point_of_sale.view_pos_pos_form"/>

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

                <xpath expr="//field[@name='lines']/tree/field[@name='price_subtotal_incl']"

                       position="after">

                    <field name="customer_note"/>

                </xpath>

            </field>

  </record>

<field name="partner_to">{{object.partner_id.id and object.additional_recipients.ids }}</field>

In this way you can add the records under the orderlines alos we can add these notes under the notes tab

Hope it helps