It's beyond ironic, and well into the hypocritical that Catholics reject the notion of *sola Scriptura* because the term isn't found expressly in the Bible as such, and yet are willing to give the assumption of Mary and the doctrine of the trinity a pass based on references and inferences.
That isn’t the sole reason to reject Sola Scriptura. Additionally, Sola Scriptura is superficially reasonable. However, that is a different discussion. Besides the Church doesn’t teach Sola Scriptura, so it would be logical to assume some teachings wouldn’t be chapter and verse.