account-financial-tools/account_move_name_sequence/views/account_move.xml

<?xml version="1.0" encoding="utf-8" ?>
<!--
  Copyright 2021 Akretion France (http://www.akretion.com/)
  @author: Alexis de Lattre <alexis.delattre@akretion.com>
  License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
-->
<odoo>

    <record id="view_move_form" model="ir.ui.view">
        <field name="model">account.move</field>
        <field name="inherit_id" ref="account.view_move_form" />
        <field name="arch" type="xml">
            <xpath expr="//field[@name='highest_name']/.." position="attributes">
                <attribute name="invisible">1</attribute>
            </xpath>
            <xpath
                expr="//div[hasclass('oe_title')]//field[@name='name']"
                position="attributes"
            >
                <attribute name="attrs">{'invisible': [('name', '=', '/')]}</attribute>
                <attribute name="readonly">1</attribute>
            </xpath>
            <xpath expr="//div[hasclass('oe_title')]//h1//span" position="attributes">
                <attribute
                    name="attrs"
                >{'invisible': ['|', ('state', '!=', 'draft'), ('name', '!=', '/')]}</attribute>
            </xpath>
        </field>
    </record>

</odoo>