If they have emerged from anything, it would be from the imagination and subjective experiences and beliefs of human beings (along with gods, ghosts, and other supernatural beings in the myths and religions of different cultures). We do not see anything of the kind in nature examined with objective methods.
Possible – especially in the case of demons. Doesn’t mean they cannot be quite real in the experiences of those who believe in them.
But angels are different. These are sent by God, and very rarely an experience of people. Though… when people do believe in angles then some of their more common experience of angels might be of similar nature and a product of their own imagination and subjective experience of reality.
No angels don’t evolve (not the ones created by God). Emergence as a phenomenon of natural law not spiritual would only apply to those created by human imagination. Evolution (life) requires a system of natural law which is what the physical universe is all about. But the subjective angels might evolve as human culture evolves.