No, it actually hasn't been.
First, the claim was made by an unnamed source. Who was that source? Were they reliable? Were they being honest? No one knows.
Secondly, how do they know they were affiliated with Antifa? Their claim of identifying them as Antifa was that they recognized them from an earlier protest. Your link to the NY Post provides a link to that protest but there's no mention of anyone at that protest being with Antifa. So there's no way of knowing if they actually were Antifa.
Thirdly, the unnamed source claims they recognized two people on Insurrection Day. That's it. Two. There were far more than 2 people fighting through those barricades.
Fourthly, even if there were some Antifa members there, you have absolutely no evidence whatsoever they were among the group busting through those outer barricades.
Fifthly, investigations have determined there were no members of Antifa there. However, there were some Trump supporters dressed up to appear like they were Antifa.
Sixthly, out of the more than 1000 people arrested or died, not one was identified as being affiliated with Antifa.
Seventhly, many of the people arrested were seen carrying weapons, various irritant sprays, firearms they maintained nearby, zip ties, etc. These were Trump supporters who clearly attended the rally that day intending to be violent. Not one of them identified as Antifa.
In summary, you have utterly failed to show Antifa was responsible for busting through those barricades.