xorriso-tcltk binary package in Ubuntu Focal i386

 xorriso is a command line and dialog application, which creates, loads,
 manipulates, and writes ISO-9660 file system images with Rock Ridge
 extensions.
 .
 xorriso-tcltk offers the most important features in a single GUI window
 together with help texts and references to xorriso's man page.
 The xorriso commands which get triggered by GUI components are shown in a
 scrollable text field or optionally may get logged to a file.
 Click on any GUI component by the rightmost mouse button to see the
 component's help text.

Source package