Incorrect. Anything that is taught by all the Bishops and the Pope in unity is infallible. It does not have to always have been taught.
So you’re saying that the pope/bishops can teach something new? How is this possible? They can teach a doctrine different from what Christ handed down, or different from Scripture? OF COURSE NOT!
This is where many people’s specific/modernist view of the magisterium is wrong. You want to argue that the current magisterium is free from error - always. Yet, you also want to say that it must jive with Tradition/Scripture. IT CANT BE BOTH. So what’s the solution?
As has been pointed out numerous times on this thread, the solution is that 1) the current magisterium is infallible when they teach SOLEMNLY, or 2) when they teach non-solemnly, yet infallibly, and they are RE-AFFIRMING TRADITION.
The third option is they teach non-solemnly, and non-infallibly and therefore can err. Like at V2.
There are no new truths, no new doctrine, no new cathechism. We must believe today the SAME EXACT TRUTHS as Christians of the 1st century. If the current hierarchy isn’t RE-TEACHING what has always been taught, as St Paul said “They are anathema!”