God did not create anything with "the appearance of age." He created the universe, the earth, the ecosystem, and man, as mature, fully functioning entities.
The purpose of the stars, according to
Genesis 1, is "to give light upon the earth."
Genesis 1:15.
And in case we missed it He repeated it in verse 17 "And God set them in the firmament of the heaven to give light upon the earth."
It would be a pretty stupid god to create the stars to "give light upon the earth" then forget to create the light shining on the earth