That pic by itself?
I mean, sexuality does not really work around the intellectual knowledge of what sex a character is supposed to have.
There is kind of a spectrum, though.
Straight or gay is just a label you slap on people, but what you are really into is another thing.
Going for a really feminine crossdresser is technically homosexual, but it is also a completely different thing than going for big hairy dudes.
There is a lot of overlap if you get into the fringes where you have androgynous or trans signifiers.
Gay or straight really comes down to who you usually find attractive.
If you go after presumably female people, regardless of genitals, that's not really gay. If you wish your gf had a dick, that puts you not into the gay camp, but it means you like cock and there really is no alternative to trans-something for that combination.
But it's really much harder to describe sexuality than to just follow where your appetites lead you. Especially with an internet full of weird porn.