I think as long as the pups tummy is ok you won’t have a problem with confusion. My 2 get dry food with a topping of wet, mostly, but on especially hot days it’s all wet, they love it. Very much preferred over dry.
I’d just start by mixing it in , but I’d also feed a mix of wet and dry anyway but with a good quality kibble . Mine has wet for breakfast ( Applaws pouches) and wet and dry for tea ( Millie’s wolfheart kibble and Applaws chicken in broth tins) . Applaws is the only wet food our picky dog will reliably eat all the time .