If natural light includes stage light, I'm self nominating this one of the great, 2023 Grammy winner for Best New Artist and Best Jazz Vocal Album, Samara Joy. The illuminating light, the striking pose and poise, the voluputous body accented by the highlights on the piano, all make for an onstage portrait IMHO!
Interesting question. Just what makes light "natural?" The definition of natural is existing in or caused by nature; not made of caused by humankind. Traditionally I think natural light is used to describe photos lit by the sun, or by lightning strikes, fire, or other "natural" events that produce light.
I might argue that humankind is part of nature. So light that humans produce exists within nature and are natural–be it incandescent, electronic flash, LED, or whatever. I will probably lose that argument. But what about the aforementioned fire? If the fire was started by a lightning strike it is natural, but if it is in a fire pit at the beach it isn't natural?
So then there is "available" light. Stage lighting falls in here. The light was there and available to you and you made great use of it. W. Eugene Smith is quoted as saying, "available light is any damned light that is available," and I think that would include lights that a photographer brings with them to an assignment.