Comment 1 for bug 1860848

This is because "lsb_release -d" does not contain "LTS" yet on focal. When it does, the text used here follows this template:

Welcome to the Ubuntu Server Installer!

The most popular server Linux in the cloud and data centre, you can
rely on Ubuntu Server and its five years of guaranteed free upgrades.

The installer will guide you through installing Ubuntu Server
{release} LTS.

The installer only requires the up and down arrow keys, space (or
return) and the occasional bit of typing.

This is version {snap_version} of the installer.