OMG! Ubuntu! has published a tutorial showing you how to upgrade to KDE Plasma 5.27 on Kubuntu 22.10.
How to Upgrade to KDE Plasma 5.27 on Kubuntu 22.10
Upgrade to KDE Plasma 5.27 on Kubuntu 22.10 using the Kubuntu Backports PPA. Learn how to add the PPA to upgrade Plasma in minutes.
How to Upgrade to KDE Plasma 5.27 on Kubuntu 22.10 - OMG! Ubuntu!