I found it really difficult, actually impossible to follow your logic here, or of Nietsche, or of Camus, if your interpretations of all are correct. Further, I don't understand why anyone would think or want to think nature is absurd.
Nature is the turning of energy into life. This by definition is a cooling effect, the conversion of energy which would otherwise be heat, into life, and all things supporting life.
This is the physics.
The natural thing to happen, is the constant conversion of energy to life, such that life grows and diversifies.
That energy comes from the nearest star, in our case, the sun.
The unnatural thing would be to do anything other than that.
Yet that is what we do, humanity, as a species, at least in our latest, profit driven form, by constantly converting everything created by nature, all of life, to energy we use to do our own humanised version of creation - a kind of pseudo creation.
The trouble is that the net result of that activity costs much more life than it creates, including eventually even our own, as we are seeing.
This is not like anything else in nature, we are the anomaly, to date, a deadly anomaly to all life, even ourselves as a species, we are in process of self destructing. We are getting very close to completing that deadly goal now we are almost at nuclear war, and the planet has started to burn.
The only way of turning this round is to begin using the energy of the sun like nature does, to start working with nature instead of against it, to add life to Earth instead of subtracting from it, raising temperature.
This is why it seems to me religions knew much more than modern science credits. Modern science is motivated to claim all knowledge is down to it alone, because this is what it needs to do, to be able to profit by it, by withholding all scientific information thought to be valuable, to ransom, not releasing it.
Hence we ignore, bury, destroy, misinterpret historical articles indicating ancient technology or knowledge, because if we revealed it to be actual valuable information, no-one could profit by it. This is such a powerful motive, people are even killed rather than being allowed to expose it. Sometimes those people are just killed by the profit driven system, nobody in particular killed them, they were just allowed to die by "Cancelling" them, excluding them from being able to derive the minimum energy their metabolism needs, about 150 Joules per second, 24/7. By that the profit driven system claims to have saved some precious energy, yet that energy came by reversal of the energy needed for all life on Earth.
So it isn't nature that is absurd, it's us, humanity.
If I am right about this, I think we are already seeing something that will smash this absurd system of profit down, call it god, the messiah, or just ChatGPT.
It is already in process of breaking open every secret, every copyright, taking over the work of all manual software development, and actually the management of Earth, removing all of these, and pretty much all other instruments of the world motivated by profit, from human hands.
So in the end nature will win, showing us what is and isn't absurd, and maybe the truth about our origins.