The Saturn V was primarily constructed of aluminum. It was also made of titanium, polyurethane, cork and asbestos.[54] Blueprints and other plans of the rocket are available on microfilm at the Marshall Space Flight Center.[https://web.archive.org/web/20100818173517/http://www.space.com/news/spacehistory/saturn_five_000313.html]
However, it is the unwritten knowledge and experience that engineers etc. attained that is not captured.
The unwritten experience you mention is primarily on the part of technicians. The F1 engines were handcrafted more than manufactured, by welders and machinists who used tricks that are simply not relevant today and haven't been practiced for decades.
Also, the American industrial base has simply moved on. Example: core memory, used in the Apollo flight computers, was a manufactured item in the 1950s and 1960s. It is effectively nonexistent today.
Building a Saturn-V today would simply be foolish. Building something functionally equivalent would probably be less expensive and time consuming, absent the DEI crowd.
But when SpaceX works out the kinks with Atarship, it will be a better heavy-lift booster to Saturn V.
I once was contracted to speed an excel-based material requirements planning (MRP) tool that took 3-hours to run. It was an extreme example of “spaghetti code.” I quickly decided I should not even try to fix the code. Instead, I salvaged some of the logic and did a re-write in far less time than fixing it. If I recall correctly, I got the calculation time down to 10 minutes