Precise numbers don't matter, the important point is that it's two comparably-sized minorities colliding - something that seems to be counter-intuitive for many to reason about. (I would have thought the percentage of lesbians was a bit higher myself).
Did a bit of searching, and found this 2011 paper by Anne Lawrence:
The concept of autogynephilia defines a typology of MtF transsexualism and offers a theory of motivation for one type of MtF transsexualism. Autogynephilia resembles a sexual orientation in that it involves elements of idealization and attachment as well as erotic desire. Nearly 3% of men in Western countries may experience autogynephilia; its most severe manifestation, MtF transsexualism, is rare but increasing in prevalence. Some theorists and clinicians reject the transsexual typology and theory of motivation derived from autogynephilia; their objections suggest a need for additional research.
I only have the abstract though, so I don't know how that figure was generated.
The percentage of that "nearly 3%" actually going on to act on it in public is clearly going to have gone up recently.
Here's Blanchard on that in 2019:
Question: "Has the prevalence of autogynephilia increased in recent decades, or are autogynephiles simply more likely to transition than they once were?"
I very much doubt that the prevalence of autogynephilia per se, or the prevalence of autogynephilic gender dysphoria, has increased. I think that what has changed is the proportion of autogynephilic trans who have “come out” to their families, friends, and employers, not the total number of autogynephilic trans. Forty years ago, an autogynephile’s decision to transition to the female role often had negative consequences in the personal and employment spheres. Now that decision is as likely to get them praised for courage as it is to get them criticized for selfishness and irresponsibility.
The change in consequences for the androphilic trans has been much less. They tend to be conspicuously feminine (or effeminate) in manner, even when they are trying to “butch it up,” and this was as true 40 years ago as it is now. The androphilic trans had less social status to lose by transitioning then, and that is also true now.
When I looked at the relative numbers of autogynephilic and androphilic gender-dysphoric males back in 1987, the autogynephilic cases were already a majority, approaching 60 percent. The proportion had reached 75 percent by 2010, and it might be even higher now.
I don’t know of any evidence of significant populations of autogynephilic MTF trans in any non-Western countries. That doesn’t mean such individuals don’t exist. It could simply mean that, for non-homosexual males, the social cost of “coming out” as trans is much higher in non-Western cultures.
Current figures have the "trans" population being 1% or so? Not sure how that's broken down male vs female. If that number has gone up recently for males, it's going to largely be that 3% coming out as "women" more, and I think there's still a lot of scope for that to increase further, as it's still a minority of that 3%.