Usually, no—there’s little benefit to importing exported JPEGs back into Lightroom. Your catalog already tracks the original RAW files and edits, and Lightroom can always generate a fresh export when needed. Bringing exported files back in often creates duplicate versions with different names or file types, which can make organization messier.

A common approach is to keep exports in a separate folder outside the catalog, and only keep them if they serve a purpose—such as a ready-to-show portfolio, quick sharing, or a convenience backup. If an export has been delivered and can easily be recreated, many photographers simply delete it.

If your goal is to manage files sent to services or folders, Lightroom’s Publish Services is often a better fit than re-importing exports. It’s designed to track exported/published versions more intelligently without cluttering your catalog with duplicate image files.

So the practical default is: keep Lightroom focused on your originals and edits, store exports separately, and retain only the ones you actually need.