Miran, who currently sits on the White House’s Council of Economic Advisers, would fill the seat through January.
US Muslim group highlights the legal statutes that it says enable the Trump administration to investigate the incident.
Laurent Saint-Cyr is meant to be the last head of the council as it prepares for a nationwide vote to elect a president.
Satellite images reportedly identify 26 mines in rebel-held Myanmar next to China and two near Thailand.