Hello @지환 강
Generally, there is no way to install the previous version of WhiteBoard from MS Store.
You could refer to this thread : Microsoft Whiteboard - back to previous version.
How to download Microsoft Whiteboard old version
(Note: This is a third-party link and we do not have any guarantees on this website. And Microsoft does not make any guarantees about the content.)
Best Regards
Karlie
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