Genesis 6:9 (KJV)

9 These are the generations of Noah: Noah was a just man and perfect in his generations, and Noah walked with God.

10 And Noah begat three sons, Shem, Ham, ad Japheth

Generations of Noah’ is followed by subsequent generations described later in the passage. This is not the very first of the generations (Adam was) so Noah is not acknowledged as being ‘created’ or given weight as being  in the day’.