MSIX app stuck "In certification" for 5+ business days; support ticket page (Engage Center) does not load

Hello, our MSIX desktop app (Store ID 9NL62L2T1W43) was submitted for certification on October 19, 2026 (first submission). Pre-processing completed, but it has remained "In certification" for more than 5 business days, with no certification report or action required. Partner Center states certification takes up to 3 business days.

We tried to open a support request, but the Engage Center page (reached from aka.ms/storedevsupport and from the Partner Center AI assistant's "raise a support ticket" link) stays on the loading screen indefinitely for our individual developer account, so we cannot create a ticket.

Could someone from the Store team check the submission, or advise another way to contact developer support? Thank you.