@TeXhackse Good news. Successfully installed. Installation of #TeXLive 2023 pretest needed about 30 minutes on my old linux notebook. First test build of #scrlayer-fancyhdr was also successful. Test build of KOMA-Script is running.

Unfortunately there is still no biber.aarch64-linux, so I still cannot switch from #babelbib to #biblatex (using biber), because the build machine for my TeX Live repository is a Raspberry Pi4. 😢