There is also a corresponding pandoc github issue, where people also report 
success with ConTeXt:
https://github.com/jgm/pandoc/issues/5409#issuecomment-678782766

On Sunday, August 23, 2020 at 5:51:11 PM UTC+2 Håkon Wium Lie wrote:

> Also, Prince will happily create tagged PDF from HTML.
>
> http://www.princexml.com
>
> (I'm on the board of YesLogic, the company behind Prince)
>
> Håkon Wium Lie haa...-EO96REbE7qRuMpJDpNschA@public.gmane.org www.wiumlie.no/en
>
> Leonard Rosenthol wrote::
>
> > That is because the current PDF creation processes from Pandoc (either 
> via
> > TeX or HTML) cannot produce a proper Tagged PDF, that is required for
> > screen reader integration.
> > 
> > Your current best bets are to produce the PDF from Word/DocX using either
> > MSWord or LibreOffice, with the option to create Accessible/Tagged PDF
> > turned on or to produce ICML with Pandoc and use Adobe InDesign to 
> produce
> > the Tagged PDF.
> > 
> > I am currently producing Tagged PDFs from Markdown through both of these
> > paths and they each have their own pros and cons...
> > 
> > Future looking, Adobe is actively working with (and funding!) work in the
> > TeX community produce Tagged PDFs - its a ways off, but it will happen.
> > 
> > And Google just announced that Chrome (and one would assume CEF) can now
> > produce Tagged PDFs (
> https://9to5google.com/2020/07/29/chrome-tagged-pdf/),
> > so perhaps we'll find an HTML-based path to get there soon as well.
> > 
> > Leonard
> > 
> > On Sun, Aug 23, 2020 at 10:06 AM Jim <james.b...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> > 
> > > I'm producing a series of PDFs that are going to be read with a
> > > screenreader. The screenreader lets the user skip through a document by
> > > jumping to the next header. I've created documents in both Word and
> > > Markdown that include headers, but when I use pandoc to convert these
> > > documents to PDFs the headers are not included. The text that is 
> defined as
> > > a header has a different visual style, but it isn't a header from the 
> point
> > > of view of the screenreader.
> > >
> > > I am able to produce a PDF with headers if I "Save As" from word and 
> then
> > > create a PDF using Microsoft's own PDF creation tools. I'd really like 
> to
> > > use pandoc for this, though, as it would offer me a ton more 
> flexibility.
> > >
> > > Is there a particular command I need to use in order for pandoc to 
> retain
> > > headers when creating a PDF?
> > >
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> > > <
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> >
> > > .
> > >
> > 
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> .
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