Why Allied supply submarines were unnecessary in the Pacific

Did the Allies use submarine supply ships in the Pacific during the Second World War?

No: escorted surface ships carried much more, while submarines were used for exceptional high-value, low-volume supply runs such as those to Malta.

The Allies did not need submarine supply ships in the Pacific because ordinary surface vessels could move far more cargo in one voyage. Escorting those ships was a better use of the large surface force available there. Exceptional British submarine runs to Malta in the Mediterranean served a different need. Those missions carried high-value, low-volume equipment when the circumstances justified using scarce submarine capacity. Covert delivery was a specialized solution rather than a substitute for normal maritime logistics.