overding an async function in odoo js

so I'm working on POS I added a custom qr code to the receipt generated but now I'm getting an encoding error because the async function to decode the image is set to time 0 - I want to override that function

the function is

odoo.define('point_of_sale.ReceiptScreen', function (require) {
    'use strict';

    const { Printer } = require('point_of_sale.Printer');
    const { is_email } = require('web.utils');
    const { useErrorHandlers } = require('point_of_sale.custom_hooks');
    const Registries = require('point_of_sale.Registries');
    const AbstractReceiptScreen = require('point_of_sale.AbstractReceiptScreen');
    const { useAsyncLockedMethod } = require('point_of_sale.custom_hooks');

    const { onMounted, useRef, status } = owl;


    const ReceiptScreen = (AbstractReceiptScreen) => {
        class ReceiptScreen extends AbstractReceiptScreen {
            setup() {
                super.setup();
                useErrorHandlers();
                this.orderReceipt = useRef('order-receipt');
                const order = this.currentOrder;
                const partner = order.get_partner();
                this.orderUiState = order.uiState.ReceiptScreen;
                this.orderUiState.inputEmail = this.orderUiState.inputEmail || (partner && partner.email) || '';
                this.orderUiState.isSendingEmail = false;
                this.is_email = is_email;

                onMounted(() => {

                    setTimeout(async () => {
                        if (status(this) === "mounted") {
                            let images = this.orderReceipt.el.getElementsByTagName('img');
                            for (let image of images) {
                                await image.decode();
                            }
                            await this.handleAutoPrint();
                        }
                    }, 0);
                });

I want to change it to

        await this.handleAutoPrint();  
    }
}, 1000); 

I tried extending the class but the first code runs then mine which should not be the case