The forums site was run by volunteers who decided to retire when EL7 was at EOL.
https://lists.centos.org/hyperkitty/list/devel@lists.centos.org/message/EGOA27SGN7W7ASFFFBNUZJ5BXSFT4NKX/
https://lists.centos.org/pipermail/centos-devel/2023-February/142775.html
https://lists.centos.org/pipermail/centos-devel/2022-October/164924.html
At this point, I would consider the information and links gone.