Simple "Apollo" numbers were never assigned to the first three uncrewed flights, although renaming AS-201, AS-202, and AS-203 as Apollo 1-A, Apollo 2 and Apollo 3, had been briefly considered.

The missing Apollo 2 and Apollo 3 missions in NASA's lunar program aren't indicative of a coverup.

The Apollo program, also known as Project Apollo, was the United States human spaceflight program led by NASA, which landed the first humans on the Moon in 1969. Apollo was conceived in 1960 in the Dwight D. Eisenhower presidency during Project Mercury and executed after Project Gemini.

NASA ultimately changed from an unpiloted, Earth-orbiting mission to a crewed flight around the Moon. Frank Borman, Jim Lovell and Bill Anders were the first crew to fly atop the powerful Saturn V booster, ultimately spending 20 hours orbiting the Moon.

Neil Armstrong, Edwin"Buzz" Aldrin, and Michael Collins make history as Armstrong and Aldrin become the first humans to walk on the Moon in July 1969. The second lunar landing of the Apollo Program was completed by Charles "Pete" Conrad, Richard Gordon, and Alan Bean in November 1969.

Apollo-Saturn 203 (AS-203) is sometimes referred to as Apollo 2. It was an unmanned mission that was launched on July 5, 1966 and was destroyed about six hours into the flight though it managed to orbit four times.

This mission was originally called Apollo Saturn-204 (AS-204) but was redesignated Apollo 1 as a tribute. On September 11, 1967, numbering of the Apollo missions began with the fourth subsequent uncrewed test flight, Apollo 4. Apollo 5 and 6 were also uncrewed flights. There was no Apollo 2 or 3.

AS-202 (also referred to as SA-202 or Apollo 2) was the second uncrewed, suborbital test flight of a production Block I Apollo command and service module launched with the Saturn IB launch...

Apollo 2 is a modular humanoid robot platform with bipedal and wheeled mobility, advanced AI, and dexterous manipulation for real-world operations.

Because of retroactive naming changes after Apollo 1 there was no Apollo 2 or Apollo 3. Those names are sometimes used to refer to the AS-202 and AS-203 unmanned tests which is likely the source of the contradictory information you're seeing.