LinuxAndUbuntu published a guide about setting up Canonical Livepatch on Ubuntu 20.04 LTS.

How To Set Up Canonical Livepatch On Ubuntu 20.04 "Focal Fossa"

Canonical Livepatch was introduced in Ubuntu 16.04. The livepatch option allows you to install kernel updates without system reboot. It is a great option and servers must have it enabled to prevent system reboot.

The upcoming Ubuntu 20.04 “Focal Fossa” supports Canonical Livepatch.

How To Set Up Canonical Livepatch On Ubuntu 20.04 "Focal Fossa" - LinuxAndUbuntu