Good day! net-vpn/networkmanager-l2tp is de-facto unmaintained. There are open bugs and pull requests for ages. Have emailed. I'm CCing Alexey, the maintainer. Thanks!
Hey, I believe this is probably more suited for QA, but there's nothing "too bad" happening here. We can process stale PRs and drop the package to maintainer-needed, so in future the proxy-maint project will see any contributions done in our Github platform. Alexxy please let us know if you still use and wish to maintain this package.
Joonas Niilola picked it up in [1]. Thanks! [1] https://gitweb.gentoo.org/repo/gentoo.git/commit?id=b75a29acb9631dbbda055aae0f3b7008b0eacd9f