Here is a demonstration of my doubt

    <button onclick="navigate()">
        Click it
    </button>

    <div id="content-display"></div>

    <script>
        async function navigate() {
            const myWindow = window.open("https://www.example.com", "", "width=100,height=100");

            myWindow.onload = function() {
                const innerContent = myWindow.document.body.innerHTML;
                displayContent(innerContent);
            };
        }

        function displayContent(content) {
            console.log(content)
            const contentDisplay = document.getElementById("content-display");
            contentDisplay.innerHTML = content;
        }
    </script>

I couldn’t see any log on either of the windows and div “content-display” never changed