This seems so simple, if you believe in creation you must find away to make it fit.
My thoughts are this, when God created Adam was Adam a new born? No. I don’t know his exact age, but for sake of argument let us say he was 21. Adam was one second old but he was 21 as compared to you & I. His body had a past built into it. His skin wasn’t new born, his hair, we can presume, could be cut, as if it had not just appeared brand new.
Now take that thought & transfer it to all of creation. The universe was created with a past, not a past that actually happened but a past created by God.
The Earth was created with a past. Scientists can say the Earth is such & such old, but only because God created it in that first week with a built in past.