Velar control chain/water pump

Moin, I hope someone can give me information. I drive a Velar year 2018. A few months ago the control chain had to be renewed. So far so good, now has noticed after some time that the water pump is also defective. Didn’t it have to be automatically renewed when changing the control chain? I did it like this, I assume it is/was, only after the control chain repair in front funny noises. Thanks in advance