However, I'm not sure how it can be done using the current GUI.
The implementation is fairly simple - you add a string under the ring control. If it's empty, it shows all results. If not, it searches all content and displays the matching results in the table.
Is there's a way to keep the category (error code range)? will the search scope should be only in the current category? or perhaps a category column should be added to the table?
I don't remember if the ring has an "all" option (although it probably wouldn't hurt), but the search should definitely be done on the current category, since it's a filter on what was originally displayed in the table. I don't think a category column is needed for that.
That said, this is just one suggested implementation. If NI decides to implement this idea, they might come up with another option.
Also, whoever implements this, please PLEASE don't build the search in the same way as it is in Quick Drop, where there's an auto-complete. Do something more along the lines of this example*, where the string is only used to filter the list in the table.
Available in LabVIEW 2019 and later.