The columns in the Level Manager tool should be customizable according to our specific requirements. For instance, when exporting the level report, we should be able to select which columns to include. Currently, we are unable to export the 'Library' column from the Level Manager tool.
Your idea relates to the existing MicroStation idea "Export DGNLIB name to report" https://bentleysystems1.aha.io/ideas/ideas/MSR-I-1654
I will move your idea to the MicroStation/PowerPlatform ideas list.