Hello Gloria Major,
Welcome to Microsoft Community.
I'm sorry to learn of the inconvenience, but I may not be able to help you more on this issue because we are not allowed to provide any third party software or hardware to our customers due to community rules.
In fact, I think you can ask some of the common scanner brand suppliers about whether their scanners are compatible with the Surface Pro 11's arm Processer, and you should be able to get some recommendations from them.
I won't be able to help you, but I'll leave that question open in case one of our amazing volunteers has ideas for you.
Best Regards,
Mitchell | Microsoft Community Support Specialist