The migration tools between UE4.24 and 4.27 are somewhat different in terms of migrating resources

Hello, I created a blank project in UE4.24 and UE4.27 respectively and created a plugin in the project. At the same time, I created a new blank level under different versions of the project, and put a StaticMeshActor of a Cube, which is referenced to the Material under the plug-in. Now I am ready to migrate this level. I found that when I migrated the level in UE4.24, I could see where that Material was (especially under that plugin content). But migrating the level in UE4.27 doesn’t migrate the material for me (materials and paths don’t show up in the asset report). I would like to report the same assets migrated in UE4.27 as in UE4.24. Do I need to enable some settings in UE4.27? thank you for your help.