If my daughter’s fiancé died and he did not have anything written and we need to bury him, can we get a durable power of attorney?

A power of attorney lapses at death. So a durable power of attorney ("durable" means that it remains in force even if the person becomes incompetent) would be no help.? The deceased's next of kin have the right to decide how to dispose of the remains and a fiancee is not considered related.