Thank you, Adrian! @All, that "removal request" (https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1103035) looks a bit frightening at first sight, but it only refers about those platforms that we have missing dependencies for. Once LinuxCNC is officially not prepared for these, as expressed by this removal request, we are free to transition to Trixie - I hope.
Adrian was kindly helping out with it. Best, Steffen