sagemath is not available in the official repositories in Noble (24.04). It was available until mantic (23.10).
Was it removed completely? Or is it going to be back? How to install sagemath in Ubuntu 24.04?
Unfortunately building from source is not an option since the gcc/g++ version 13 is so hopelessly unstable it is no longer able to build such a an enormous project without the infamous "internal compiler error" popping up constantly.