The team captain has no special status or privileges, but has a degree of responsibility for the behaviour of the team.
The team captain (or any player or team official) has no right, according to the Laws of the Game (Refer Law 3), to approach a match official or to question/dispute a decision.
The philosophy and spirit of the Laws of the Game are that all those in authority, especially coaches and team captains, have a clear responsibility to the game to respect the match officials and their decisions. Participants have an influential role in shaping the image of the game and the team captain should ensure that the Laws of the Game and referees’ decisions are respected.
Although, match officials should treat players with respect, this does NOT mean answering all questions related to decisions made in a game or entering into disputes with players (be it the captain or any other participant). Team captains, players and team officials should respect the role of the match officials, regardless of whether or not there is agreement on a decision made during a game.
The Laws of the Game can be found here: https://www.theifab.com/