Didn't know that but still the comic with Dewey (can't find it in the archive though) shows that the UNA don't control TJH yet (nor all nations before 1541)
But Keveak isn't helping the UNA in any way (rather the other way as he does acquire knowledge of the home base without supporting them thus being free to sell that information to the resistance (though he would also tell for free) without actually betraying anyone)