This is pretty much standard in the industry, isn't it?

Nobody implements a feature from a competitor and says "hey, we copied this from X".

Look at Android & iOS, with an eternal back-and-forth copying (notifications from Android->iOS, permissions from iOS->Android, etc.)

And coming up with the idea doesn't have to mean inventing the idea, it can simply be "why don't we implement this cool feature that someone else is using?".

Imitation is the sincerest form of flattery.