Can struct type be static dispatch in swift?

Question

I think that I almost understand what will be static or dynamic dispatch.

As far as I know, struct instance with struct type will be always static dispatch.

struct A {
    func yo() {
        print("A")
    }
}

var a: A = A()
a.yo()

But, struct instance with protocol type (using protocol method) will be dynamic dispatch without using protocol & extension.

protocol Foo {
    func yo()
}

struct A: Foo {
    func yo() {
        print("A")
    }
}

var a: Foo = A()
a.yo()

So, I just wonder that "Can struct type be dynamic dispatch?" If will, Could you tell me some example? ⬇️ ?? is anything instance

var a: structType = ?? 
a.yo()