I don't think there is a significant or notable number of people who believe transmascs are not oppressed.
I feel slightly insane just having to type this out, but this is rhetoric you inevitably come across if you discuss transfeminism on Tumblr.
The mainstream, cissexist understanding of transmasculine people is the Irreversible Damage narrative (one that's old enough to show up in Transsexual Empire as well) of transmascs as "misguided little girls", "tricked" into "mutilating themselves". It is a deliberately emasculating and transphobic narrative that very explicitly centers on oppression, even if the fevered imaginings misattribute the cause. As anyone who's dealt with the gatekeeping medical establishment knows, they are far from giving away HRT or even consults with both hands, and most transfems I know have a hard enough time convincing people to take DIY T advice, leave alone "tricking" anyone into top surgery.
Arguably, the misogyny that transmasculine folks experience is the defining narrative surrounding their existence, as transmasculinity is frequently and erroneously attributed to "tomboyish women" who resent their position in the patriarchy so much they seek to transition out of it. This rhetoric is an invisiblization of transmasculinity, constructed deliberately to preserve gendered verticality, for if it were possible to "gain status" under the sexed regime, its entire basis, its ideological naturalization, would fall apart.
Honestly, the actual discussions I see are centered around whether "transmisogyny" is a term that should apply to transmascs and transfems alike. While I understand the impetus for that discussion, I feel like the assertion that transmisogyny is a specific oppression that transfems experience for our perceived abandonment of the "male sex" is often conflated with the incorrect idea that we believe transmasculine people are not oppressed at all. This is not true, and we understand, rather acutely, that our society is entirely organized around reproductive exploitation. That is, in fact, the source of transfeminine disposability!
I know I'm someone who "just got here" and there is a history here that I'm not a part of, but so much of that history is speckled with hearsay and fabrication that I can't even attempt to make sense of it. All I know is that I, in 2024, have been called a revived medieval slur for effeminate men by people who attribute certain beliefs to me based on my being a trans woman who is also a feminist, and I simply do not hold those views, nor do I know anyone who sincerely does.
If you're going to attempt to discredit a transfeminist, or transfeminism in general, then please at least do us the courtesy of responding to things we actually say and have actually argued instead of ascribing to us phantom ideologies in a frankly conspiratorial fashion. I also implore people to pay attention to how transphobic rhetoric operates out in the wider world, how actual reactionaries talk about and think of trans people, instead of fixating so hard on internecine social media clique drama that one enters an alternate reality--a phantasm, as Judith Butler would put it.
Speaking of which--do y'all have any idea how overrepresented transmascs are in trans studies and queer theory? Can we like, stop and reckon with reality-as-it-is, instead of hallucinating a transfeminine hegemony where it doesn't exist? I'm aware a lot of their output isn't particularly explicative on the material realities of transmasculine oppression despite their prominence in the academy, but that is ... not the fault of trans women, who face extremely harsh epistemic injustice even in trans studies.
The actual issue is how invisiblized transmasculine oppression is and how the epistemicide that transmasculine people face manifests as a refusal to differentiate between the misogyny all women face, reproductive exploitation in particular, and the contours of violence, erasure, and oppression directed at specifically transmasculine people.
You will notice that is a society-wide problem, motivated by a desire to erase the possibilities of transmasculinity, to the point of not even being willing to name it. You will notice that I am quite familiar with how this works, and how it's completely compatible with a materialist transfeminist framework that analyzes how our oppression is--while distinct--interlinked and stems from the same root.
I sincerely hope that whoever needs to see this post sees it, and that something productive--more productive dialogue, at least--can arise from it.