I’m confused about your statement that “Reformed Covenant Theology is way more developed.” Catholic Covenant Theology is amazingly extensive - in fact we see the OT revealed in the NT and the NT concealed in the OT because of Covenant Theology. The priesthood, the stewardship of the kingdom and apostolic authority as well as the sacraments - especially the Eucharist and Baptism have deep roots in Covenant Theology. I agree that Scott Hahn- as a former Reformed pastor, strong-anti Catholic and biblical scholar is a great read. I recommend the book A Father Who Keeps His Promises. Also, David Bergsma has a great little book called Bible Basics for Catholics that journeys with wit and wisdom through the Biblical covenants. There is no shortage of extensive, well understood covenantal theology in Catholicism and to say that Reformed Theology is way more developed on this point is (in my opinion) a statement of opinion. Happy seeking- there is much truth to be found!