What is "present time" in physics?

The problem of relativity is the understanding of the notion of present time, that is to say the notion of simultaneity (which should not be confused with the notion of chronotropy).
Is there on the planet Fomalhaut IV, a princess Alexandra who lives there, at the same time as me; me who is here on earth?
That is to say in the same present moment?
It must be said that yes, since whatever procedure of universal synchronization I adopt, whether mine or that of Albert Einstein, there is necessarily a LABEL, and only one, to characterize the existence of Alexandra simultaneous with mine.
But according to the method of "synchronization of present time", we will not have the same label.
Einstein uses procedure M, Hachel procedure H.
Procedure M is the most practical, procedure H is the most true. Procedure M is the most practical, because it derives from the synchronization of the present time on a point M placed very far away in
an imaginary fourth dimension, and at an equal distance from all the points constituting our universe. This gives an abstract universal time, but very useful, where the notion of universal present time is flat, and reciprocal. If A exists at the same time as B for M, then B exists at the same time as A for M. It is very practical.
Procedure H proposed by Richard Hachel is less practical, but truer. It is less practical, because the notion of symmetry of the present time will not be absolute. But it is truer, physically more accurate, and more beautiful. It will remain eternally true experimentally, and eternally more beautiful philosophically. What could be more beautiful than saying to a child: "This horse in this meadow, this moon in the sky, this galaxy in this telescope, you see them instantly, as they are today, live-live".
What is uglier than human thought, which thinks it is intelligent,
even though it is full of stupid mockery, conceptual imbecilities, simply because it can say, as all morons say: "The speed of light is c, we know it, we have measured it, experimented with it, and we get 3.10^8m/s".
This is the most stupid reflection in the history of humanity, proposed by mocking morons (Python, John Baez) who think they are funny and intelligent, authorized mockers, but who have not understood anything about the notion of universal anisochrony and the two possible ways in which we can (or even MUST be able to) synchronize the clocks of the universe.
R.H.