Suppose, not entirely hypothetically, that a vendor tells you that you need 32-bit Office. With 2016 and 2019, this is not so easy. Microsoft has official docs that explain how to do it, but of course, they are outdated and no longer work.
Here’s the trick: install any 32-bit Office component, and then the Office installer is smart enough to install the 32-bit version. I suggest something like the free Visio Viewer. Make sure you download the 32 bit version, of course.