The statements, "Rome will lose the Faith and become the seat of Antichrist" and "the Church will be in eclipse" are part of the apparition that was originally approved with an Imprimatur by Monsignor Bishop of Lecce.
Moreover, the statement "Rome will lose the Faith and become the seat of Antichrist" doesn't mean the antipope will be the Antichrist per se. It's only saying that Antichrist will be positioned in Rome some way.
A couple problems with your opinion/personal opinion here:
1. This interpretation has not received any ecclesiastical approbation whatsoever, much less an
imprimatur.2. Say "that Antichrist will be positioned" is highly problematic. You fail to personify the Antichrist. You're suggesting that the Antichrist will be a tendency, a movement, or a "spirit" rather than a MAN. Catholic Tradition is unanimous that the Antichrist will be an actual man, who will not suffer (allow) any other worship than to himself. Even Pope Francis totally fails this litmus test. So do the conciliar Church and the novus ordo Mass! They allow us to love God (though they do a lousy job of leading us there), to pray as much as we want, etc. They are just dangerous, ineffective, counter-productive, and mixed with poison.
Some Scripture passages have a figurative meaning as well as a literal one. For example, Our Lord's prophecy of the End of the World predicted elements of the Fall of Jerusalem in 70 AD, as well as the end of the world itself.
I would put forth that any prophecy that speaks only of a "figurative" Antichrist is pretty useless. THAT Antichrist has been with us for centuries! The whole spirit of liberalism, exaltation of man over God, etc. is nothing new. Every single government on earth today would be guilty of being "a seat of Antichrist" in that respect.
I doubt Our Lady or Our Lord would lower themselves to making such a banal prediction. So what I suggest is that Our Lady was predicting the ACTUAL, FLESH AND BLOOD Antichrist with a capital A. Also known as "the Man of Sin"