Hi there!

Thanks for your query.

Are you asking about the articles details page or the blog page? Screenshots would be better with indication to what you want and how along with your site URL.

However, if you are talking about the blog page ordering of articles addon then the following code in your custom css will give you the desired output I hope:

.sppb-addon-articles .sppb-addon-article {
    flex-direction: column;
        }

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

Best Regards