https://konsole.kde.org/ links to "user support" https://konsole.kde.org/users.html at the top of the page that links to "Konsole Handbook" https://docs.kde.org/trunk5/en/konsole/konsole/index.html that is 404. I see that https://docs.kde.org/index.php?language=en&package=konsole has a working link to a manual.