When an individual enters the United States, can they have an immigration attorney present (physically or remotely via phone) when going through the U.S. Customs and Border Protection (CBP)? E.g., to advise the individual on their responses to the US CBP agent's questions, or directly answering the questions. If that matters, assume that the individual is a US lawful permanent resident and French citizen.
CBP generally prohibits interviewees from having access to legal counsel during immigration inspection. The American Immigration Council's Behind Closed Doors: An Overview of DHS Restrictions on Access to Counsel has a fairly thorough account of the restrictions and of their dubious legality.