Hello,
They put their e-mail in a PKGBUILD file for another of their AUR PKGBUILD files.
https://aur.archlinux.org/cgit/aur.git/tree/PKGBUILD?h=libzim8
Michal has already said that the PKGBUILD does not have a email provided, please see [1] there is no email only a username/name? I can also confirm that the email is hidden from their profile [2].
If the maintainer is not active and does not respond within a week or two then you could mark the package as out of date and then do an orphan request to take over the package.
Before doing this, I would send the patch to the comment section, if then the maintainer does not respond then you should flag for orphan explaining you have tried everything in your ability to contact the author, and reference the comment you sent. I can see you have commented [3] the patch. I have also flagged the package out of date as there is a newer version [4], the last update was at the end of 2023, it is safe to say this package is abandoned, just give the maintainer a few weeks to a month just in case. I would say wait until 2025-03-05 (one month from your comment) and if there is still no response, then go for the orphan and adopt the package for yourself. This is more than enough time for the maintainer to respond. Take care, -- Polarian GPG signature: 0770E5312238C760 Jabber/XMPP: polarian@icebound.dev [1] https://aur.archlinux.org/cgit/aur.git/tree/PKGBUILD?h=icu73-bin [2] https://aur.archlinux.org/account/doclai [3] https://aur.archlinux.org/packages/icu73-bin#comment-1010042 [4] https://github.com/unicode-org/icu/releases/tag/release-76-1