

Screen reader should pick that up.
It’s a bit trickier in LaTeX (depending on layout), given they convert to an untagged pdf by default using pdftex. For defaults such as section/subsection etc I think some auto-tagging has been added, but my memory is not great.
Issues crop up when you need to hack something (e.g. indenting parts of a proof using the quote environment to aid readability, creating more complex tables, or just using coloured text to indicate element relations), and here manual tagging is a must!

























The fact we have to check tells us a lot about the state of the world.