The 1980’s TV series Highway To Heaven starred Michael Landon as the Angel Johnathan Smith. He was on Heavenly probation looking to earning his wings. He would travel about the Earth helping out people along the way. He was a human who died and went to Heaven before returning to Earth with a new appearance. There’s no indication if every human had to do this or if it was something only borderline cases had to perform. The series showed there was a Hell bad people went to. Thankfully in our world, nobody goes to Hell unless they actually want to!
In our reality “Wings” on Angels refers to paranormal powers and knowledge. In that respect, every Angel has wings unless they become Fallen and descend into Demonhood. In order to ascend to higher planes of existence, one must earn their way by various means. This could include manifesting on Earth to aid humankind on an individual basis. Of course, this is done over the grand Multiverse expanse in a wide array of Parallel Universes. Otherwise, our society would be overcrowded with Angels walking among us. This process includes both Human origin and Heaven origin Angels.
When someone dies their spirit crosses over into the fifth dimension. This creates a metaphysical big bang of mathematical probabilities. The spirit splits into parallel afterlives just as we live out parallel lives in all manner of Universes. Some of these lives go to a Heaven in which we return to Earth as an Angel earning their wings. In this capacity, our powers may be limited or only active when an Archangel supervisor deems it necessary. In some incarnations, we become our own Guardian Angels. This is just a few of the many methods to gain wisdom and unique experiences in our quest to become more complete beings. Eventually, all our parallel Afterlives in any given dimensional level coalesce into one being that ascends to the next higher dimension. The initial goals are to become an Archangel and then an Omniverse God!
Perhaps you had a mysterious stranger abruptly enter your life with eager intent to aid you in some manner of trouble you were experiencing. Maybe they were extremely subtle about it and you only now realize they helped you out. Then one day they just disappeared without a trace. More than likely you were dealing with an Angel! On the other end of the spectrum, you might have had a stranger who was inexplicably hell bent on screwing up your life before vanishing. Odds are strong it was demon out to earn their horns!
See also It’s A Wonderful Life Is Real