Ich darf mal eben DistroWatch.com dazu zitieren:

TUXEDO OS is an Ubuntu-based distribution developed in Germany by TUXEDO Computers GmbH, designed and optimised for the company's own range of Linux-friendly personal computers and notebooks. The distribution uses KDE Plasma as the preferred desktop. Some of the differences between Ubuntu and TUXEDO OS include custom boot menu, the TUXEDO Control Centre, Calamares installer, availability of the Lutris open gaming platform, preference for the PipeWire audio daemon (over PulseAudio), removal of Ubuntu's snap daemon and snap packages, and various other tweaks and enhancements.

Das klingt eigentlich genau nachdem wonach ich die ganze Zeit suche: KDE auf Ubuntu, ohne nervige Snap-Idiosynkrasie und PipeWire, noch dazu aus Deutschland.