There is only one mind. There are not two minds. There’s not one mind that is universal in which everything arises simultaneously and spontaneously, and another mind that is relative in which everything arises linearly. Mind is a singularity that operates at different frequencies.
For the person deep within ecstatic equilibrium, everything arises simultaneously with no relativity. From the point of view of the individual identity within mundane consciousness, everything’s relative. This is where the idea of phenomena arises.
There has to be a second thing to observe a first thing. A perceiver has been carved out of infinite consciousness, and the perceiver begins the chain of events called perception. Perception produces a product. That product is called phenomena.