Same problem here. 2013 AWD Edge. From day one.
Dealer said it was probably just a sticky tappet that would go away after a couple thousand km (after break-in). Still doing it at 3500.
I've been a hot rod builder for years (not professionally) and I've built many engines. Knocking is seldom ever benign. Knocking is one part hitting another. If it's a mechanical noise it's got to be doing some damage it all likelyhood.