Obviously- sexism isn't hurting Marine Le Pen or Pauline Hanson.
While I agree that women can be populist demagogues, the US has such a unique gender gap in its size and cultural scope that it's hard to apply lessons from other countries to us.
For instance, I was floored to find out how minimal the gender gap for Brexit was. A referendum like that in the US would have produced a big gender gap. That kind of divide would hurt women in right leaning populism just because there are less women on the right.