I suppose that's true if you care whether someone came up with something independently. I dont, at all. Nothing is created in a void and my experienxe is that even the most original or clever idea, large or small, has plenty of other instances in existence.
That's not always the case. And obviously only the developer of this knows the truth, so it's really up to ones moral compass, but there is a difference between being inspired by a product to make something new versus literally copying someone else's work with zero impactful changes.