My friend... Did you read the scan? or rather, have you read Naruto? "Izanagi is the PRACTICAL APPLICATION of the Creation of all things". Do you know what practical application is? because then, Izanagi is LITERALLY one of the effects of Onmyouton, Hagoromo completely dominates Onmyouton, Izanagi is an ocular jutsu that makes Uchihas able to use a fraction of Onmyouton's capabilities, but it has a high cost. Izanagi is Onmyouton, "Creation of all things" is Onmyouton, Hagoromo is master of Onmyouton.
You know that "life" there is an expression for "make it real", right? Onmyouton makes impossible things happen, turns fantasy into reality, "giving life" to something in the sense of making something into a living being is just one of the effects of Onmyouton, but not the main one, other examples of Onmyouton: Izanagi, Nullification of Ninjutsu of the Gudoudamas, Naruto recreating Kakashi's eye. All these effects are the fruit of the user's imagination, they make imagination come true, it has been said more than once. Onmyouton goes beyond just bringing something to life, it makes impossible things in reality. An example that the scan gives us is: Yin is where imagination reigns, Genjutsu is an example of Yin, it's just illusions, an illusory world, fantasies. Yang can make things happen, such as making the user's shadow extend and take on shapes and so on. When both are blended perfectly, it is possible to make Yang "bring to life" the illusions of Yin, that is, make these fantasies come true. This is Onmyouton.