How does covenant theology handle the priestly covenant?

Covenant theology generally regards God's covenants with Noah, Abraham, Moses, David, and the new covenant as the primary divine covenants. The priestly covenant Numbers 25 seems to go largely ignored. My knowledge comes mostly from the lectures of the covenant theology course of Reformed Theological Seminary (listening online, not attending) and it isn't mentioned. All that I found is a footnote in The Christ Of The Covenants saying the priestly covenant is just considered an extension of the Mosaic. Is there anything more to this or is the topic just not discussed?