Actor "landscape" deleted, how do I restore the "landscape" actor?

I accidentally deleted the “landscape” actor in UE 4.27. In UE 4.26 and UE 5 it was also deleted. Completely reinstalling didn’t solve the problem. In UE 4.23 this actor was there, but when imported into UE 4.26 and UE 5 it’s still gone.
How do I restore the “landscape” actor?