The right-back is the son of former Reds star Phil, who is currently the head coach of Inter Miami.
A deal has been struck to send the 18-year-old to USL League One side Fort Lauderdale, who play in the third tier of American soccer and act as the Reserves team for Inter Miami.
Harvey moved up from United's Under-18s to link up with Neil Wood's Under-23s team in Premier League 2 and grew in stature as the season wore on.
He provided a couple of quality assists and scored his only goal of the season in the 3-0 victory over Arsenal on 12 February.