Hello,
Welcome to Microsoft Q&A!
As far as I know, you can't upload a framework package to the Microsoft Store. Also, according to the Store policy, Your product must be fully functional and must provide appropriate functionality for targeted systems and devices. You can't upload a framework package that is not runnable. I'd suggest you package your dependencies into your app's package instead of uploading another framework package.
Thank you.
If the answer is the right solution, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.