Fedora Kinoite has not been released yet, but you can give it a try using unofficial builds. Official release is planned for Fedora 35.
See details from this Fedora Magazine article: Discover Fedora Kinoite: a Silverblue variant with the KDE Plasma desktop - Fedora Magazine
See also the original thread about Kinoite: Kinoite, a KDE (and now XFCE) version of Fedora Silverblue - #225 by Siosm
Work is in progress to setup Rawhide builds on official Fedora infrastructure. Fedora Kinoite is now available officially in Fedora ostree repository for the Rawhide branch. Progress is tracked in Issue #4: Fedora Kinoite (KDE Silverblue) - SIG - Pagure.io.
We also need KDE Apps as Flatpaks. Progress is tracked in Issue #13: Build Flatpaks for KDE Apps - SIG - Pagure.io