The Bible tells us that God created Adam in this way:
“… the Lord God formed the man from the dust of the ground and breathed into his nostrils the breath of life, and the man became a living being.”
Adam’s apparent age was (say) 20 years only one second after he had been created.
In the same way, the stars being instantly created, have got an apparent age built-in which is much greater than their actual age.
That makes it rather tricky to work out the age of the universe!