So, then, you can quote a magisterial teaching which explicitly says that there are souls in hell?
"Hell, then, here signifies those secret abodes in which are detained the souls that have not obtained the happiness of Heaven. In this sense the word is frequently used in Scripture. Thus the Apostle says: At the name of Jesus every knee shall bow, of those that are in Heaven, on earth, and in hell (Phil. 2:10); and in the Acts of the Apostles St. Peter says that Christ the Lord is again risen, having loosed the sorrows of hell. (Acts 2:24). DIFFERENT ABODES CALLED “HELL” These abodes are not all of the same nature, for among them is that most loathsome and dark prison
in which the souls of the damned are tormented with the unclean spirits in eternal and inextinguishable fire. This place is called gehenna, the bottomless pit, and is Hell strictly so-called." (from ‘The Catechism of the Council of Trent (with Supplemental Reading: Catholic Prayers’; my emphasis).
“The Benedictine constitution states that “We, with our apostolic authority, make the following definition,” and then goes on to declare that the souls of the just, who die in God’s friendship, “soon after death and, in the case of those who need it, after purification, have been, are, and will be in heaven.”
Similarly, “the souls of those who die in actual mortal sin go down into hell soon after their death.” The operative word
in this doctrine is usually translated “soon,” i.e., mox in Latin, and it is understood to mean “promptly.”” (from ‘The Catholic Catechism: A Contemporary Catechism of the Teachings of the Catholic Church’, by John Hardon SJ; my emphasis).
The use of the present tense would appear to suggest that there are, indeed, souls in hell.
Ludwig Ott writes: 'The souls of those who die in the condition of personal grievous sin enter Hell (De fide) (Fundamentals of Catholic Dogma, page 479). He references Benedict XII’s Dogmatic Constitution ‘Benedictus Deus’…as per John Hardon.
Make of this what you will.