Read more on https://www.thewindowsclub.com/restore-display-view-for-files-grouped-by-date-modified-in-downloads-folder

The File Explorer allows users to group the files by Date, File size, Type, Size, or None. However, now, Windows 11/10 users have reported that their files in Downloads folder are grouped by Date modified, and they have been unable to restore it to the previous/default display view. This can happen due to a bug or if the user preference was set to default after Windows Update.

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