Being takes countless forms. Whatever may be thought, each form of being is nothing but change. A death is the end of one of them: once a living entity, maybe with an identity and now deeply mourned.
That said, this is said with metta:
Entities and identities are in the mind. And so are beginnings and endings. Along with dukkha.
موتوا قبل أن تموتوا
mūtū qabla an tamūtū
die before you die
Entities, living and not, are in the mind. To die before you die, go beyond the mind.
Do only what need be done to be and let be.
Do no harm. Be well.