Hello,
Have you verified if the issue persists when using a different version of Windows Photo, or if updating the application has any impact on the visibility of the paper size option?
There's could be compatibility issues for integrating print drives with Windows Photo. You may want to explore any Windows Documentation | Microsoft Learn for any insights.
You might consider reposting this thread on Stack Overflow - Where Developers Learn, Share, & Build Careers, where I noticed there are tags related to print development. It's a platform more tailored for developers and might be better suited for addressing your concerns.
Regards,
Karlie