Upgrade to Kubuntu 20.04 from Kubuntu 18.04

I am following the steps listed at https://help.ubuntu.com/community/FocalUpgrades/Kubuntu but when I run the following command

sudo do-release-upgrade -m desktop

I get the following output

Checking for a new Ubuntu release                                                                                                                                                                                                            
There is no development version of an LTS available.                                                                                                                                                                                         
To upgrade to the latest non-LTS develoment release                                                                                                                                                                                          
set Prompt=normal in /etc/update-manager/release-upgrades.       

Not sure why I am still cant upgrade to 20.04.1

Me too, I can't upgrade fully updated freshly-installed Ubuntu MATE 18.04.5 LTS system without PPAs to 20.04.1 LTS.
So I have reported bug 1890936 to LaunchPad.

At first install all updates to the current version with

sudo apt-get update
sudo apt-get dist-upgrade

Then as a workaround you have to use

update-manager -d

or

sudo do-release-upgrade -d

to upgrade.

Releases dont get enabled until the weekend after the point release according to this comment https://bugs.launchpad.net/ubuntu/+source/ubuntu-release-upgrader/+bug/1890936/comments/4

So the only solution is to wait out a few days.