Oops. Sorry about that. I forgot to add an author's note earlier and the update went out without one.
Resistance to mind control is by no means uniform. But it is true that people who identify as a aro-ace tend to be largely immune from the effects of mind control. Of course that also means their resistant to certain forms of telepathy. Especially technologically-aided telepathy. This is why Synema and Speak To Me books don't really work for Evey. It's also the reason why they can't read Grand Galactic Tongue.
This of course brings up the subject of neurodivergence which I've seen people talk about in the comments. Evey is neurodivergent but it's not because of being aro-ace. And their neurodivergence isn't the reason why their resistant to mind control. That is directly down to their being aro-ace.
I hope this clears up some things for folks.