引入兩組ga4

<script async src="https://www.googletagmanager.com/gtag/js?id=G-6JCG6ZWMG2"></script>
<script async src="https://www.googletagmanager.com/gtag/js?id=G-4JQ44BZSW0"></script>
    

兩組ga4一起設定

<script>
    window.dataLayer = window.dataLayer || [];
    function gtag(){dataLayer.push(arguments);}
    gtag('js', new Date()); // 設定一次時間給兩組共用

    // 同時設定兩組GA4
    gtag('config', 'G-6JCG6ZWMG2');
    gtag('config', 'G-4JQ44BZSW0');
</script>