Thank you!
I just wanted to say that it worries me to see "penis owner" associated with toxic masculinity, I understand the frustration if this person or the discourse you are referring to really does come from entitlement, but I believe it is transmisogynistic to assert that trans women or transfems in general have this sort of attitude that you seem to be (I might be misunderstanding you) equating to male entitlement. It seems like a strawman where trans women are pressuring others to have sex with them and be attracted to their genitalia (as archetypal Men would do), whereas trans men and transmascs are more submissive and understanding (as archetypal Women would be). Anything that equates trans people, particularly trans women, to their sex assigned at birth, raises a red flag to me and runs the risk to be bioessentialist.
There are definitely transfems that may say things like this, such as the person you are referring to, but there are also many trans women that do Not have that "entitlement", and I for one have never ever met a single trans woman that has felt "entitled" to sex from people who are repulsed by penises. And I know a lot of trans women. That is not to say that trans women are incapable of harm obvs, there are trans women who abuse people, just as there are cis women, trans men and cis men who do the same.
Maybe it's because I don't live in the US so I haven't seen this discourse (although I do spend a lot of time in online trans spaces) framed in such a way. I have seen, and I spoken about with fellow trans people both online and irl, about how it sucks to have to hear how your body is disgusting and have it be justified as an orientation - this is equally painful and alienating when it comes from cis lesbians talking about how dicks are awful and Inherently Violent, or cis gay men talking about how vulvas are repulsive and "fishy". You mention transmascs are left out of the conversation, but in my experience we are present, and we don't think it's okay for guys on grindr for example to go on about how they could never ever be attracted to a trans man because of their genitalia.
About the statement in itself, i.e. Is it transphobic to have genital preferences, I don't particularly care, as long as people keep it to themselves and don't use it to be hurtful. Just like if someone isn't attracted to fat people, as is common, they can just say "sorry I'm not into you" to the specific person, instead of going on about how fat bodies are repulsive. Most trans people I know wouldn't want to have sex with someone who doesn't find us attractive anyway, and there are plenty of people (cis, trans, gay, bi or straight) who do.
I dunno. I don't feel like I am being very articulate but it really rubbed me wrong to read blanket statements like that about trans women and I feel like I would be doing a disservice to my transfem sisters if I didn't speak up about it. I am sorry for this wall of text on your personal thread, I might be projecting but transmisogyny is so rampant I really wanted to bring some nuance to this topic. I hope I kinda managed to get across what I'm trying to say. I recommend reading
Julia Serano, who is far more eloquent than me, and her many writings on trans topics in general.