Yeah it's implied that she got the chaos magic from the stone and it was unlocked when she went through emotional distress.
But they didn't outright confirm if she could do the probability hexes prior to the stone or not. They made it vague, which is what I was talking about to the breh earlier. They didn't wanna confirm whether or not she is a mutant in this universe yet, in my interpretation.
Some will say she is one because of Agatha's wording, but I think they left it in the air. Very frustrating. They also bullshytted the pietro explanation. It feels like they avoided answering the hard questions because they haven't made real plans for the X-Men yet and they didn't want this show to mess something up.