The Appropriations Committee has one of the broadest jurisdictions of any committee in Congress. It is responsible for appropriating funding for most of the functions of the federal government. Under Rule X of the Rules of the House, the Committee on Appropriations' jurisdiction is defined as "(1) Appropriation of the revenue for the support of the Government. (2) Rescissions of appropriations contained in appropriations Acts. (3) Transfers of unexpected balances. (4) Bills and joint resolutions reported by other committees that provide new entitlement authority as defined in section 3(9) of the Congressional Budget Act of 1974 and referred to the committee under clause 4(a)(2)."
In the 116th Congress, the Appropriations Committee has 12 subcommittees that each have jurisdiction over a specific part of the federal government. A list of subcommittees with the agencies under their jurisdiction is here.