Copy Playing Cells Here ⌘⇞

Currently defined as command-pageUp

Copies the currently playing cells to the selected scene.

Edit Live Loops scenes in Logic Pro — Apple Support

You can copy playing cells to a single scene. This is useful if you want to combine cells from different scenes into a new scene. If you copy playing cells to a scene that already contains cells, the copied cells replace any existing cells on the same track in the scene.