Fellow oldie here

When we were in university, professors who had contacts in the manufacturing industry would post a bill on the notice boards stating that some of the factories they know have a slot for visit open. If there was enough interest, the thing would go on like any other group visit. Logistics, dates, etc.

During the visit, the professor and their contacts would walk us through the shop floor explaining the stations along their production line. Sometimes, there’ll be a walkthrough of their logistic decision making processes. Usually concluded with a q&a session with some manager in the factory. Back then, we broke students were curious regarding how our education made us suitable for a job there and what soft skills are expected of us.

So, hitting someone up where you are interested in visiting might be a good start.