The reason linuxdeployqt does not support your latest ubuntu is not, that its not up to date, but it is on purpose.
If you build your appimage on a new linux and then want to run it on an older installation it might not work there since e.g. the libc version on the older system does not support new features that have been added. And running on any system is the whole point of the appimage.

@aliemrenebiler said in linuxdeploy:

can you help us?

Can you provide more information please?
What errors do you get?
How do you the deployment?