The LDS Church has a teaching that God the Father is the "ultimate Creator"
The following has Jesus Christ being the creator: https://www.churchofjesuschrist.org/study/ensign/1988/08/i-have-a-question/why-do-latter-day-saints-believe-that-jesus-christ-was-jehovah-of-the-old-testament?lang=eng
So based on the LDS understanding of following passages from the book of Isaiah we read the following.
Thus says the Lord your Redeemer, and the one who formed you from the womb, I, the Lord am the maker of all things, Stretching out the heavens BY MYSELF, And spreading out the earth ALL ALONE.
Isaiah 44:24, NASB (Emphasis added)
For thus says the Lord who created the heavens (He is the God who formed the earth and made it, He established it and did not create it a waste place, but formed it to be inhabited). I AM THE LORD AND THERE IS NONE ELSE.
Isaiah 45:18, NASB (Emphasis added)
Do Latter-day Saints believe the Father or the Son created the heavens and spread out the earth all alone? And depending on that answer, is it the Father or the Son who states, "I am the Lord God and there is none else"?