i have one code for to do running in browser with puppetter but my code not running it seems like my code error but i confused repair my code

const puppeteer = require('puppeteer');
fs = require('fs');
var data = fs.readFileSync('./number/data', 'utf8');

function splitStr(data) { 
    (async () => {   
    const browser = await puppeteer.launch({
        headless: false,
        slowMo: 50
    });
    const page = await browser.newPage();
    data = data.split('\n').forEach(async data => {          
            await page.goto(`https://web.whatsapp.com/send?phone=${data};text=kaka`);    
            await page.waitForTimeout(40000);
            await page.click('[class="_3HQNh _1Ae7k"]');
            await page.waitForTimeout(1000);
            page.bringToFront();
        
        })();
    });
} 

splitStr(data);