Is Canonical Livepatch not supported on non-LTS release like Ubuntu 18.10?

Solution 1:

As per this (old) documentation,

The Canonical Livepatch Service applies kernel fixes in microseconds, without restarting your Ubuntu LTS system.

and

The Canonical Livepatch Service applies security critical Linux kernel patches without rebooting, keeping your Ubuntu LTS systems secure and compliant.

(emphasis mine)

Also as per System Requirements in this Ubuntu wiki article, currently supported releases are Ubuntu 14.04 LTS , Ubuntu 16.04 LTS, and Ubuntu 18.04 LTS.

Since Ubuntu 18.10 is not an LTS release, it's not very surprising that it's not supported.