Mine were, and still are at times, whingers too.

I remind my 3yo constantly when she whinges "talk to me in a normal voice please" "is that your normal voice or your yucky voice?" "is that the way to ask or is there a better way, without whinging, and in a normal voice?" etc etc

It works in the moment then she'lll forget again... but I'm trying to be consistent so she learns the right way to speak to me and others.

I think its very very common though. We just try not to give in to her requests if she's whinging for them, and reward her when she speaks properly and nicely.