Mayor Zohran Mamdani’s administration hasn’t bothered to study his city-run grocery store plan’s potential effect on local small businesses, his budget chief admitted Tuesday. The revelation came during a City Council hearing when Sherif Soliman — the director of the Mayor’s Office of Management and Budget — was grilled on what studies the administration was conducting to see how nearby grocers would be impacted. “We are attuned to those issues,” Soliman said when pressed by Councilwoman