It seems to me the US would be better off copy-pasting EU regulation than trying to smush apples behavior into old school antitrust violations.
[0] Its essentially those actions where the DoJ is the agency representing the government interest, including all federal criminal cases and some federal civil cases. Civil cases by other agencies have the agency name; so the antitrust complaint by the DoJ, 15 state governments, and the District of Columbia is United States of America, et al. v. Apple, but the SEC action against Coinbase was Securities and Exchange Commission v. Coinbase, Inc., and Coinbase Global, Inc.