There's no knowing her true political beliefs
Why, do you know for a fact she was unusually coy about them? In the 1920s and '30s? Why presume it is hard to know?
It might indeed be hard to know. She might have taken extra care to avoid this being known, and conceivably was deeply apolitical, perhaps. I am no expert on her biography and I infer you can't be either, or you wouldn't make such a long reach as finding a fascist overseas you think you can characterize as a "feminist" and infer from that you can apparently presume any random feminist whose detailed views you happen to be ignorant a possible fascist.
Clearly logical contradictions in politics get overlooked all the time. It is illogical to expect a typical 1930s fascist to be a feminist, though you claim Moseley was one, however you define feminism. I'm guessing it is a very very stretchy definition of that you are using. I'd ask you to elaborate on how Moseley could be a feminist, but it isn't strictly on topic.
As for "no way to know," let's start by looking up
Amelia Earhart on Wikipedia:
Right there in the introduction we have
She was also a member of the
National Woman's Party and an early supporter of the
Equal Rights Amendment.
[7][8]
https://en.wikipedia.org/wiki/Amelia_Earhart#cite_note-10
Are you familiar with the National Women's Party and its general platform beyond the obvious suffragette plank? I'm not, but behold there is a link to it. Skimming through it, I can't see any red flags of fascistic leanings in the party as a whole or in its leadership or its actions. There was a lot of compromising with segregationists, several controversies hinging on whether African-American women should be included or not--but we can't take the normal spectrum of American racism as evidence of fascism as such, obviously; distinctions were maintained among the racist schools of the day. (Nazi propaganda held up the Ku Klux Klan as evidence of American degeneracy, any way I have seen it used in a negative context in Nazi WWII era propaganda posters--go figure why).
NWP then might have had some people in it who leaned fascistic broadly speaking, but it hardly seems characteristic of them as a group.
You may of course feel free to scan the Wikipedia article on Earhart herself, or any reputable source you care to share, that presents any sort of case for her leaning fascist in any way whatsoever. Her life involved many associations with many people, some of whom like Lindbergh and perhaps various corporate associates (she was quite entrepreneurial) have fascist associations of their own. But beware cherry picking; a quick skim of the article mentions another friend of hers being Eleanor Roosevelt.
The article includes accounts of various myths about her (and strongly tends to discredit the notion Japanese foul play might have terminated her career--Jackie Cochran went through Japanese archives after the war and found no warrant for that idea whatsoever, I mention this because I brought it up and it is due diligence to advise the thread that is far fetched and unlikely in the extreme). None of these discuss her politics one way or the other.
You might be technically correct; with such diverse associates she might have taken care all her life not to be politically pigeonholed, or she might have taken stands in one period she regretted or had simply moved on from in another.
I would bet though that any thorough, careful, well researched documentary on her turns up enough evidence of her leanings to generally categorize her in the American context, and would bet none of it resembles an American fascist profile. Glancing over her background, her family seems to have been both mildly progressive and her father actually somewhat feckless; her personal self-liberation does seem logically in contradiction with general fascist notions. I'd say she was a moderate to liberal American of her day.
Feel free to prove otherwise. Or to vindicate the claim there is "no way" to know her politics, which might be true but would have taken unusual effort on her part to obscure, most people leave a pretty clear paper trail on that.
Certainly dead people of long past generations are fair game for ATL butterflying too.
But gratuitously making Earhart a fascist on whim strikes me as smearing and with various unsavory agendas too--to whitewash Lindbergh for instance (I might be wrong, but I already shared how I think he falls short of the label in his deeds despite his known faults) or to beat a culture wars drum trying to discredit feminism as such.
At any rate it seems mean.