Joseph Losing the “Plates” and “Interpreters” was Mystical not Literal

The "Urim & Thummim" were perhaps Joseph's own eyes, which in a mystical state of consciousness could "see" the visionary "plates." He lost these "gifts" for a time.

Was Joseph Smith intentionally deceitful or lying about the “Gold Plates”? A Mystical View

If Joseph made the plates he had in his possession, then didn't he lie in saying otherwise? Maybe there is more to it, which ties into the mystical nature of his visions.

The Mystical State of Consciousness in Joseph Smith’s First Vision

I suggest that Joseph Smith's earliest direct encounters with God happened in mystical experience, or what is also known as altered states of consciousness.