Thanks for writing to us.
To update the “Classic Recent Post” element, it would require custom development I would suggest you consult a developer who can assist you with your concern or you can avail our service called One, where the customization questions are answered.
Please note that we don’t provide custom development support. It is out of the support scope.
Alternatively, you can use our bundled plugin called Essential Grid to display your Posts with our builder. In case if you have not seen our Essential Grid documentation please have a look at our documentation to learn more about how to display posts through Essential Grid https://theme.co/docs/essential-grid
Thanks for understanding