Really? The scriptures I read say Antichrist is already here in the world. Read 1 John 4:3
Antichrist is here but his person hasn't yet publicly emerged.
These are two different things properly speaking.
The spirit of antichrist has been here since the Devil discovered Who Christ Is. Heretofore he had only a vague idea from his limited understanding prior to his fall. It is the demonic influence bent on mimicking and mocking the True God, in a similar pattern to Our Lord's Life and Mission, albeit twisted and turned back to Hell. Yet highly limited compared to what will be permitted to happen under the Beast.
The final Antichrist will be the fulfillment of all minor antichrists who prefigured him, along with a new apostasy that will take place in a few months or years instead of a few centuries or millennia.
I think it's important to distinguish between the two.