[Reece]

Yeah, guess you have to replace it. The finishing of new veneer is similar to a refinish, same steps. You can make a cardboard template before removing the old, use to cut the new. I make them slightly oversize. I put several coats of wood glue on the cabinet top and on the veneer bottom and let dry overnight. Have to be careful not to get glue on the topside of the veneer as it interferes with staining. Then position veneer and press hard with hot clothes iron with brown bag paper between iron and veneer. Glue softens and then grabs hard and sticks immediately. Then I use a tiny very sharp block plane and sandpaper to get the size right.

I like your offhand arrow pointing out the electric fan!