Hello,
Welcome to Microsoft Q&A!
First of all, the Microsoft Store submission API
could programmatically query and create submissions for apps, add-ons and package flights for your Partner Center account. This API is useful if your account manages many apps or add-ons, and you want to automate and optimize the submission process for these assets.
You could check this document about how to use it: Create and manage submissions.
Thank you.
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