@asantoni64 Unfortunately, there aren't any publicly available examples currently that would help illustrate 2-QWAC support specifically. However, the path we've provided is the exact location to access this information when such resources become available.
@panosv Opera for Android doesn’t currently support casting a single tab only full screen casting via Google Cast/Chromecast. To cast a specific tab, you’d need to use Chrome or another browser that supports tab casting.