How: wrap the found entities so they don't stretch all the way to right on the screen
Why: you easily miss information as you need to scroll to see it
For Who: all users
Impact: better user experience in general
Additional context: when you search, in my example, for ~200 item numbers and it finds 129 but not 61, the "not found" + remaining buttons appear all the way to the right (for which you first need to spot the scrollbar.
Maybe wrap the found items so you can open up the entire list if needed (they are in your search result anyway) and/or list them as "Found (129)" and immediately after/below: "Not found (61)" with the option to open the list of "missing". So that everything shows on your screen w/o needing scroll.
I usually want to copy the items it could not find as I need that in Excel for further analysis. Today you can select the entire list with your mouse and while holding your mouse-button use CTRL-C to copy the list (as soon as your release the mouse-button your selection is gone).
A very nice addition with by a small copy-icon that simply copies the values from the "not found" list
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