articles the right side is shown under the article

Hi there!

Sorry for the inconvenience.

You may use the following code in your custom CSS:

#sp-main-body .container-inner {
    display: flex;
}
@media (min-width: 992px){
body.view-article #sp-component.col-lg-9 {
    flex: 0 0 auto;
    width: 100%;
}
}

Hope this will solve the issue for you!

Note: Path towards custom CSS(Joomla 3): Extensions>Templates>Styles> Click on your current default template name then choose Template Options. Then find custom CSS within the custom code.

Best Regards