<?xml version="1.0" encoding="UTF-8"?>
<templates xml:space="preserve">

    <t t-name="odoometer_price_extn.Orderline"
       t-inherit="point_of_sale.OrderReceiptLine"
       t-inherit-mode="extension"
       owl="1">

        <xpath expr="//li[hasclass('orderline')]"
               position="inside">

            <!-- Add MRP display inside the order line -->
            <div class="price-per-unit"
                 style="font-size:10px; color:#666; margin-top:2px;">

                <span style="text-decoration:line-through;">
                    <t t-esc="props.line.mrp"/>
                </span>

                <span style="margin:0 4px;">→</span>

                <span style="font-weight:bold;">
                    <t t-esc="props.line.price"/>
                </span>

                <span>/unit</span>

            </div>

        </xpath>

    </t>

</templates>

/** @odoo-module **/

import { patch } from "@web/core/utils/patch";
import { Orderline } from "@point_of_sale/app/store/models";

patch(Orderline.prototype, {

    getDisplayData() {
        const result = super.getDisplayData(...arguments);

        // Add MRP to the display data
        result.mrp = this.product.mrp || 0;

        return result;
    },

});

from odoo import api, models

class ProductProduct(models.Model):
    _inherit = 'product.product'

    @api.depends('name', 'mrp')
    def _compute_display_name(self):
        for product in self:
            mrp = product.mrp or ''
            name = product.name or ''
            if mrp:
                product.display_name = f"[{mrp}] {name}"
            else:
                product.display_name = name

    def _load_pos_data_fields(self, config_id):
        fields = super()._load_pos_data_fields(config_id)

        fields.append('mrp')

        return fields

{
    'name': 'Odoo Meter Price Customizations',
    'version': '1.0',
    'depends': ['base', 'product', 'account', 'stock_account', 'tradelite_common', 'zl_thermal_invoice_print','point_of_sale'],
    'data': [
        'views/account_move_view.xml',
        'views/product_template_view.xml',
        'views/product_product_view.xml',
        'report/thermal_invoice_template.xml',
    ],
    'assets': {
        'point_of_sale._assets_pos': [

            'odoometer_price_extn/static/src/xml/pos_receipt.xml',
            'odoometer_price_extn/static/src/js/pos_orderline.js',

        ],
    },
    'installable': True,
    'application': False,
    'auto_install': False,
}

i want replace unitprice/unit by my custom mrp field.

Thanks in advance.