When exporting files, you sometimes get a message with a list of files that could not be exported - it would be great if you could have the option to show those files in the current library view so you could easily select them and re-export them with a different file size.
I second that request. It's always a mystery why they don't export, so it's a guess on what to do. I "save" that list as text (no choice) labeled as Failed Exports and the folder name. At least I can search on those names by copying from that list as displayed in Notebook then pasted into a search by the OS searcher (Cortana) in case it was indexed.
Unreliable at best. Must be a better way than just having LR throw them out without info or process.