Actually they reinvented the wheel a little bit by being the first spacecraft that used cryogenic propellant for a multi day mission/moon landing. When you look into it, what they’ve achieved is still very impressive, even if NASA did much of the heavy lifting.

And it’s doing it for around 0,05% of the price. (~$250 billion adjusted for inflation for Apollo 1 vs ~$120 million for IM-1)