I just had a lightbulb moment.
If you make an oc that is personification of something in nature, example being the snow, trees, fire, mountains, and waterfalls it would make sense if they were androgynous in design because they are a personification of elements of nature. Elements of nature are neither male nor female. They simply exist, no gender at all.
On similar note:
Makeing a god of nature oc, BOOM! NON-BINARY GOD