There is ample evidence to support that Apollo 11 moon landing was real and theories behind fake-moon landing has been debunked time and again.
Vox reported that moon-landing conspiracy theories started when 'We Never Went to the Moon' was published in 1976 by Bill Kaysing. He is widely considered the father of moon landing hoax theories. He claimed that in the early 1960s when he had worked as a technical writer for Rocketdyne, a rocket design and production company, and the job had given him access to documents proving that the Apollo mission was a hoax.
However, theories put forward by people claiming that moon landing was a hoax have been debunked time and again. The Washington Post released an article in 2019, on the 50th anniversary of the Apollo 11 moon landing. They reported that NASA spokesman Allard Beutel issued a statement saying a significant amount of evidence exists to support that NASA landed 12 astronauts on the Moon from 1969-1972. He also specified some of that evidence, including that NASA has 842 pounds of astronaut-collected Moon rocks studied by scientists worldwide for decades, one can still bounce Earth-based lasers off the retroreflector mirrors placed on the lunar surface by the Apollo astronauts and NASA's Lunar Reconnaissance Orbiter imaged the landing sites in 2011.
This conspiracy theory has been making rounds for several years, but it is baseless and false.