If what is wanted is a separate Qt-based gui, Acetoneiso qualifies: it is written in Qt and can mount and unmount images; it installs
fuseiso and two
But in spite of its name
gnome-disk-utility only comes by itself with no packages foreign to KDE. It includes the
gnome-disk-image-mounter tool which does the actual job.
sudo apt install gnome-disk-utility
To run "Disks":
To mount an image file:
or execute the file
/usr/share/applications/gnome-disk-image-mounter.desktop. This executable is not found by the launcher as long as it contains the line
NoDisplay=true; change that to
false to launch it as any other program.
(then select the iso)
To add it to context menu:
(be sure you have the folder
then paste these lines:
[Desktop Action mount]
And there are also the Dolphin services; most of those do not work, as they are outdated, and the newest ones are not the best rated. Luckily, there are exceptions, like KDE-Services (https://store.kde.org/p/998464). It seem it cannot be installed from the Dolphin-Services button; instead, it can be downloaded as tar.bz2 archive, unpacked and, by opening a terminal in the resulting folder, it can be installed by running the command
sudo make install. This is a collection of services, desktop files installed at system level in
/usr/share/kservices5/ServiceMenus/ and scripts installed in
To have a simplified service menu based on this, see this answer.