https://ftp.cc.uoc.gr/mirrors/linux/artixlinux/lib32/os/x86_64/
lib32.db 14-Apr-2020 07:12 15K
The other mirrors I checked have:
lib32.db 2020-Apr-23 12:09:43 14.5K application/octet-stream
eg.
http://mirror1.artixlinux.org/repos/lib32/os/x86_64/
https://mirrors.tuna.tsinghua.edu.cn/artixlinux/lib32/os/x86_64/
https://mirror.clarkson.edu/artix-linux/repos/lib32/os/x86_64/
https://artix.wheaton.edu/repos/lib32/os/x86_64/
https://ftp.sh.cvut.cz/artix-linux/lib32/os/x86_64/
It is updated now, marked solved.