I don't consider considering what the Apostle's taught or did not teach to be boilerplate. If you do, it's on you.
If sola scriptura is true, then it MUST be taught in scripture.
Sola scriptura is not taught in scripture.
Therefore, sola scriptura is not true.
If the non-Catholics do not want to get into arguements with the Catholics on Catholic subject threads, there an answer. Kindly stay out of those threads have issues of interest to Catholics and problem is solved.