This principle of eternal divine progenitorship in Christianity is found in God having always eternally begotten the Son.

In the late Joseph Smith (cf. Sermon in the Grove) it is in every Son having a Father, and every Father having a Son.

For Joseph Smith, it is found in the infinite regression of generated fathers and sons.

In Christianity, it is in the infinite generation of the eternal Son.

This is why I think that the Book of Mormon’s position on incarnational sonship (the Son became the Son when taking on flash) matters so much. It implicitly rejected eternal sonship and eternal generation, leaving a theological vacuum for eternal progenitorship. It paved the way for Smith to fill in the hole with his future innovation — of infinite regress.