Is everyone who dies from an abdominal disease – such as diabetes, which was not a direct cause of death – considered among the martyrs "al-mabṭūnīn" (those who die from an internal disease)?

The "Martyr of the Abdomen" (al-Mabṭūn ash-Shahīd) is one who dies from an internal illness, such as dropsy, based on the hadith: "Whoever dies from an abdominal illness is a martyr," and "Whoever is killed by his abdomen will not be tormented in his grave." Thus, the criterion for martyrdom is that the person dies due to their abdominal illness, not merely that they were afflicted with it if they died for another reason.