How does odoo 18 not show the field by default? When I execute this code via my module, the field remains hidden.

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

            <field name="name">opal.account.move.form</field>

            <field name="model">account.move</field>

            <field name="inherit_id" ref="account.view_move_form"/>

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

                <xpath expr="//field[@name='line_ids']/list/field[@name='tax_ids']" position="attributes">                   

                    <attribute name="optional">show</attribute>

                </xpath>

            </field>

        </record>