Comment 5 for bug 1828712

apport-cli contains an option for save the report from another machine. apport-cli --help says:

  --save=PATH In bug filing mode, save the collected information
                        into a file instead of reporting it. This file can
                        then be reported later on from a different machine.

and:

  -c PATH, --crash-file=PATH
                        Report the crash from given .apport or .crash file
                        instead of the pending ones in /var/crash. (Implied if
                        file is given as only argument.)

However, this doesn't work with apport-collect but if the Ubuntu Kernel Bot still wants this you could open a new bug report using --save and the --crash-file.