Where to find the information about end of support for Qt versions? I believe it got lost somewhere after switching from /qt-5.11/ to /qt-5/ routes.

Before there was this page: https://doc.qt.io/qt-5.11/supported-platforms-and-configurations.html
But it stops with 5.11 now.

And this page (https://doc.qt.io/qt-5/supported-platforms.html) contains information only about 5.12, and by the way doesn't mention its end of support.