The stack is being disregarded by Flutter web Webview, and any elements placed above the webview are not responsive.

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This is a known issue with Flutter web Webview. The stack is being rendered behind the Webview, which causes any elements placed above the Webview to be unresponsive.

One workaround to this issue is to use the Flutter web_iframe package instead of the Webview. This allows you to embed a webpage within your Flutter app and have it behave like a regular widget, allowing any elements placed above it to be responsive.

Another workaround is to wrap the Webview in a GestureDetector widget and manually handle any touch events on the Webview.

You can also try adjusting the z-index property of the elements above the Webview to bring them to the front, but this may not work in all cases.