Hello, I'm Quinn and here to help!
Normally, when an app or an update is submitted to the Microsoft Store, the certification process only takes up to 3 business days, though it can sometimes vary depending on the review. Waiting for one to two weeks is definitely longer than the usual timeframe. If you are the developer, you will need to log into Partner Center to check the status and see if your submission requires any action. If the submission has been pending for an unusually long time without any indication of progress, you can also create a support request through Partner Center Support:
https://partner.microsoft.com/support?stage=1
For more information, kindly check these articles out:
https://learn.microsoft.com/windows/apps/publish/faq/get-your-app-certified
https://learn.microsoft.com/windows/apps/publish/publish-your-app/msix/app-certification-process