Transandrogynous

Transdrogynous or transandrogynous is a term used to describe transgender people identifying with androgyny to a greater extent than masculinity or femininity. Or someone who is transitioning to an androgynous presentation. This person may be binary trans or non-binary, and they may be transitioning physically or socially.

It's similar to transmascfem but not exclusive to any AGAB. It's also not essentially combining transfeminine or transmasculine, androgyny in this case would be a mix of the binary genders, a lack of gender, or a mix of the binary genders and lack of gender.