I've been confused on if it'll shut down today or after the end of support
We don't work for Microsoft and can not give you a date for that; but I doubt it will be in the near future.
It was another 3 years after 8 ended support before they shut the store for Windows 8:
Beginning in July 2019, the Windows 8 Store is officially closed. While you can no longer install or update applications from the Windows 8 Store, you can continue using those already installed. However, since Windows 8 has been out of support since January 2016,.
You will have to wait for Microsoft to announce what they will do about it.