A scripted example is the “Studio clock”
You can also select one of the LED’s, then press [Ctrl + T] or select Create From Selection / Array from the popup menu under the right mouse button.
This will take some fiddling before you figure out how it works, so I recommend to make a backup and then start a bit of experimenting. As the array creates new footprints, they have no links to the schematic, and you have to fix those yourself.
As an alternative, you can also just draw some track or other item and create an array out of those, and then use the ends of those tracks to snap the footprints to.