Here and now does not really pertain to an objective reality because there is no objective reality.
Here and now pertains to the state that the mind is in.
All that here and now means is that when the mind is in a particular state, then that state is all that there is.
Mind is in temptation, then the temptation is all that there is.
Mind is anger, then anger is all that there is.
Here and now simply means that be alert to what is in the mind