MongoKitten has wide-reaching drag & drop support within the app. The main use for drag & drop is to copy information to another collection or database.
When dragging a row from your collection, move it to the sidebar and hover over a collection. When you drop the entity into the collection, it is immediately inserted into the collection. Copied entities keep their existing identifier.
You can also copy the entire collection to a different database. This is helpful when you want to retain the state of a collection for later use or restoration.
Drag & Drop works with multiple windows, both on macOS and iPadOS. This allows you to copy a collection between two servers with ease.