I don’t see where we (or she for that matter —hah!) disagree.
She agrees that Dark Matter is observations or a problem for something that seems to be matter from our definitions of matter and its interactions.
She didn’t claim that MOND is the only theory or answer — in fact she made a video about this exactly, that she believes she failed to adequately argue that DM is what we are discussing because people put too much emphasis on MOND or thought of it as “the only solution to the DM problem”.
She agrees that Dark Matter is observations or a problem for something that seems to be matter from our definitions of matter and its interactions.
She didn’t claim that MOND is the only theory or answer — in fact she made a video about this exactly, that she believes she failed to adequately argue that DM is what we are discussing because people put too much emphasis on MOND or thought of it as “the only solution to the DM problem”.