Wow, obviously Schwab's reporting system isn't categorizing the dividends properly. They merged with, or bought out, Ameritrade during 2023, so I suspect that this error may be related to that and that a correct form will be issued.
You can try, but for the most part they mail checks.
Also please note that the Form 1310 has to be appended as a pdf, but they *still* claim they never got it, about 2/3 of the time.
If he won't help, there's not much you can do - except to tell him you cannot prepare the final return based on air and wild guesses. You are not letting her down - he is.