It’s a very sad situation, but she had an aggressive cancer that killed her in a matter of weeks. In Germany the healthcare option that would have been offered is hospice care. (Source: family friend runs a hospice facility in Germany and it’s much more common than in the U.S.) I doubt any other socialized healthcare system would have responded differently.

Germany most certainly covers treatment for aggressive adenocarcinoma, and it's covered at 100%. Germany is literally one of the best places in the world for all levels of oncology.

This isn't just with the hope of curing someone, even when you're terminal things like palliative chemotherapy are covered which can drastically ease your suffering.