Yeah, they're just stating their sexual preference. Maybe a bit insensitive in the wording about the boobs but still not transphobic.
Edit: Wowee The comments turned into a shitshow 14 hours later. As a trans person, please disregard Unmarketable Plushie. They speak without understanding the greater context and do so with animosity, leading them to have to apologize multiple times in this post alone. Please know that most of the trans community is not like that and the inflammatory attitude you see there is generally (thankfully) only in online spaces, not irl.
Dear Meta:
Signed, The Fediverse