[...]
> Sorry, you are right.  There was a discussion to add such a package to
> ELPA back in 2018, but I guess that never happened.  However, you can
> find a URL of the package in that discussion:
>
>   https://lists.gnu.org/archive/html/emacs-devel/2018-07/msg00528.html
>   https://github.com/jhanschoo/greek-polytonic/tree/fsf

Thank you, after a quick try of this package it still does not provide
proper polytonic support.  Also, it does not follow the standard polytonic
keyboard, that is used in the education system in Greece, which is also
offered by other proprietary alternatives to emacs.  There are also some
major bugs that one might encounter, e.g stacking accents:

έ́́́́́́́́́́́́́́́́́́́́́́


Are there any plans to include proper support for the Greek language in
Emacs, similar to the support available in the rest of the GNU system
(e.g., xkb)?  I am interested in helping with this effort.

The lack of proper Greek support in Emacs, particularly polytonic Greek,
has been a significant drawback for several of my friends and
colleagues.  They need to use polytonic Greek for their school subjects,
projects & work.

This also makes emacs a non-viable option for it being taught in
schools, something that I wanted to promote in my local area.

-- 
Thanos Apollo
https://thanosapollo.org