Does the absence of a chain of narration (sanad) for the hadith raise doubts about the story of a dying person feeling the sweetness of the throes of death due to their abundant prayers upon the Prophet (peace be upon him)?

This hadith has no basis in the references, suggesting it is fabricated. Evidence confirms that everyone experiences the severity and throes of death, even the Prophet Muhammad, peace be upon him, who said at his deathbed: "There is no god but Allah; indeed, death has its throes."