Hello Marty,
Thanks for writing to us.
In case if you are using the Pro theme you can create multiple layouts for the posts through the layout builder and then assign them separately for each post as per your design.
Please have a look at our doc for Layout builder
Condition and assignment doc
In case if you are using the X theme regretfully there is no option for it, it would require custom development so I would suggest you please contact a developer who can assist you with your concern or you can subscribe to One where customization questions are answered. Please note we don’t provide custom development support. It is out of the support scope.
Hope it helps
Thanks for understanding