There are a large number of companies that make the equipment for the fabs. For example, Applied Materials and LAM Research in the Bay Area also make a a wide variety of machines. ASML makes mainly the lithography equipment which turns out to be quite expensive. Its like each vendor provides some of the equipment in the kitchen and TSMC is the chef.
I don’t know how to make a semiconductor, but does that mean that Intel couldn’t make a 7nm even if you gave them access to TSMCs fab, because they don’t know how to design a 7nm chip?
Although it's maybe complicated by the fact that Intel has active development on 7nm, so they might be able to pick up hints from an existing 7nm line.
