It’s fascinating to think about the number of PUs (procedural units) it takes to make a modern tool. Something as simple as a modern hammer must number in the thousands and a mobile phone in the millions or billions.
You might find the essay "I, Pencil" by Leonard Read interesting. It's told from the point of view of a pencil who talks about the complexity of his own creation and all of the components involved in the process
There's also Thomas Thwaites' "building a toaster... from scratch" project that goes into the details of how even an extremely simple appliance involves materials and processes that are effectively impossible for a single person to replicate (spoiler: he has to give up and "cheat" on some things).