What about numbers for things that are clearly mentioned in Genesis 1 like the sun moon and stars, fruit trees, plants, birds, humans, etc.
If we assume for the sake of argument, that the days in Genesis were based on Relativistically time dilated frames of reference, where years on an earth reference, can pass in seconds during the BB, and also assume the science estimates of earth years are true, for each phase of universal evolution; BB, expansion, galaxies, stars and planets, first one cellular life, first multicellular life, etc, the BB or God reference would need to be relativistic and also speeding up, like moving away out of and away from the event horizon of a black hole. In Christian Tradition, God becomes man; Jesus, or the BB reference and the earth reference become the same. Genesis does describe an expanding universe via relativistic reference time changes; each BB day is less earth years as a universe reference advances.
The time is measured in our reference frame hence earth years.
I don't think you are going to reinvent physics or anything else.
One analogy for the differences of the laws of physics acting in different frames, is observing a gorilla in their natural environment; BB reference, or in the zoo; earth reference. The gorilla in its own environment is natural and is connected to evolution and environmental familiarity. In the zoo, humans have to add unnatural things to contain and maintain the gorilla, and make a profit. Nature does to not provide food or clean the area. This is not apples to apples. The BB references has a much tighter time schedule, to reach the earth reference claim it took 13.7 billion earth years. The current theories try to fill in the earth time and are too slow at BB time. Thinking in two time references takes practice.
An easier example to see so one can compare different needs in two time frames is the twin paradox. In this scenario, one twin stays behind on the earth and the other twin goes on a rocket that can go relativistic speeds, so his time reference can slow. When the moving twin returns, he is about the same age as when he started, while his twin brother is very old. The old brother is the earth time reference that ages faster, while the forever young brother, is in the BB reference which ages slower in its reference.
If the traveling or BB brother wanted to return to earth, after exploring the galaxy, and be the same age as his earth brother; both will be older, while still traveling in a rocket with time dilation speeds, he would need to figure out how to make his biology go into hyperdrive. This will allow him to age very quickly; poof, so he can appear the same, as his aging twin, when it returns to earth.
He cannot be using the same laws of physics, or he will always come back way too young. He needs to speedup the aging mechanism; poof I am old. The laws of physics being the same in both references, will always leave behind a time differential in those laws, for each reference. But if the final results of the laws could be sped up, with a different theory approach, this can compensate for the time slow down. We will get a wash, so both can stay the same age, whether you move in time or not. You would not want the earth bound brother to take this medicine, since he would age and die in seconds. This medicine; theory, only works with time dilation to balance things off.
Science has found traces of early galaxies and even stars that are way too early, based on earth reference theory; close to poof within the random turbulence of reference inflation expansion shear. This condensation, will need a new way to explain the physics, since the old way was never designed to be that fast; it was not expected. The BB reference used accelerated physics, to explain the apparent earth poof!
We can conceptually do this by separating space-time into separated space and separated time. This allows space and time to act independent of each other. If one could move in space, independent of time, one could poof the material for a galaxy in space; change shear space, in zero time. The gorilla in the zoo needs to be released, so we can compare behavior; open the mind.