I have to go back and amend what I said as once I looked into what she was saying, it's more complex. She's arguing for jurisdiction stripping but like most things she argues, she doesn't really understand it. First, Marbury v Madison established it is the SCOTUS that gives the final word on the constitution and that Congress cannot expand or contract the court's original jurisdiction (cases that are files directly in the Supreme Court, most commonly disputes between states). It did not address the appellate power of the court, a distinction I missed originally.
Article III grants the SCOTUS its jurisdiction. In granting appellate jurisdiction it states, "In all the other Cases before mentioned, the supreme Court shall have appellate Jurisdiction, both as to Law and Fact, with such Exceptions, and under such Regulations as the Congress shall make." It's this exceptions and regulations language that is the issue. It's a rarely used power of Congress and has, to my knowledge, only really ever once been the center of a case, the case Ex Parte McCardle. IIRC, that case involved someone who was imprisoned during Reconstruction arguing that the suspension of the Writ of Habeas Corpus was unconstitutional. Congress, afraid the court would strike down large portions of the Reconstruction Acts, passed a law stripping the court of appellate jurisdiction in such matters. The court held it had no jurisdiction as a result.
First off, the idea of jurisdiction stripping is insane. It makes court packing look cuddly. It would essentially be an attempt to break the court system. Congress has so rarely used this power because relatively few people are stupid enough to try it.
Second, it's not as cut and dry as AOC makes it seem. The problem with AOC's position is that this part of the Constitution hasn't really been interpreted and it isn't terribly clear. One of the chief arguments is that the Court not Congress is the final arbiter of the Constitution. This has long been the case. The argument is that Congress can't use the power to make an exception to subvert the Court's role as the arbiter of the Constitution.
Also, there's the argument that amendments like the Bill of Rights have constrained Congress' power when it comes to interpretation of the Constitution. Without the courts enforcing the Bill of Rights, Congress could completely ignore it. The only way to give teeth to the Bill of Rights is to have the power of judicial review.
If Congress ever tried this, I imagine the Courts would strike down the statute stating that the exceptions clause doesn't apply to cases of constitutional interpretation. I actually think that's a good result.
So I withdraw my previous statement's about AOC being completely off base about Congress' authority to amend the SCOTUS' jurisdiction. It's a nuanced and little explored area of the law. However, now that I have looked into it fully, AOC is absolutely insane to put it forward especially when Congress already has the power to pass statutes protecting what AOC wants protected on its own.