Hi George,
I quite understand your need, but let me explain to you that this may not be possible in the short term.
The current Surface Pro manufacturing process still does not support memory scalability, because the memory core is welded to the motherboard:
But some other brands of laptops support memory expansion, you can add memory from the back.
You may find tutorial videos online that show users how to upgrade the Surface memory themselves (for example, replacing 32GB with 64GB), but they often involve taking apart the back, melting the solder to make the memory particles removable, and then manually installing new memory particles with specialized equipment, which is extremely risky. That's why Microsoft typically releases multiple versions of memory when it releases devices:

Although the current Surface products can not meet your needs, you can pay attention to our official mall, once there are new products on the line, you can communicate with our sales representatives:
**** Microsoft Surface - Microsoft Store

I hope my reply has answered your confusion.
Best Regards,
Mitchell | Microsoft Community Support Specialist