There is a shortcut named `F9` that shows/hides places panel on Dolphin. However, there is no shortcut that would hover on this panel or shift the focus there. I believe it's a missing feature. I have already shed some light on this on the KDE discussion page; you can visit this link: https://discuss.kde.org/t/shortcut-for-focusing-on-places-on-dolphin/19693/2 I was asked by someone there to submit a bug for it. That's why I am reporting this feature request as a bug.