I know what the author said (that it looks like yuri but isn't exactly yuri), and that can be because she knows how the word "yuri" is used in Japan, and the expected reception to a trans character. I've seen this before. It can be a sensitive issue. She typically draws yuri as well, and this series is exactly like her other stuff.
The official release in Japanese tags the series as Yuri, and that is the release she sends you to as well. This should match those tags, and having read ahead, I think that would be appropriate for now. Whenever there is a character like this, tags and language always get mixed up or debated.