There is a typo in your command kdeconenct needs to read kdeconnect
You should then see this output:
apt-cache depends kdeconnect
kdeconnect
Depends: kde-cli-tools
Depends: libqca-qt5-2-plugins
Depends: plasma-framework
Depends: qml-module-qtquick-controls
Depends: qml-module-qtquick-controls2
Depends: qml-module-qtquick-layouts
Depends: qml-module-qtquick2
Depends: sshfs
Depends: kio
Depends: libc6
Depends: libfakekey0
Depends: libkf5configcore5
Depends: libkf5configwidgets5
Depends: libkf5coreaddons5
Depends: libkf5dbusaddons5
Depends: libkf5i18n5
Depends: libkf5iconthemes5
Depends: libkf5kcmutils5
Depends: libkf5kiocore5
Depends: libkf5kiofilewidgets5
Depends: libkf5kiowidgets5
Depends: libkf5notifications5
Depends: libkf5service-bin
Depends: libkf5service5
Depends: libkf5waylandclient5
Depends: libkf5widgetsaddons5
Depends: libqca-qt5-2
Depends: libqt5core5a
Depends: libqt5dbus5
|Depends: libqt5gui5
Depends: libqt5gui5-gles
Depends: libqt5network5
Depends: libqt5qml5
Depends: libqt5widgets5
Depends: libqt5x11extras5
Depends: libstdc++6
Depends: libx11-6
Depends: libxtst6
Suggests: plasma-workspace
Suggests: python-nautilus