I do find it hard to believe this - that a born man suffers domestic violence at the hands of a woman ( a wife or girlfriend assuming it was a heterosexual relationship to begin with) simply because men are bigger and stronger than women so unless it's being done in manner of Pauline Fowler with a frying pan I simply don't believe in the violence aspect. Huge rows yes, physical domestic violence no.
As with gay men, IIRC transwomen who are attracted to men are at similar risk from a male partner as a woman with a male partner.
I think the stats are that Stonewall is exaggerating (NO! Who'd a thunk it?) but that the National Crime survey is under-estimating meaning that people in a relationship with a man are at roughly the same risk of DV no matter what their own sex or gender identity.
Of course the ultimate outcome of that DV may well depend on the relative physical size of the person-in-a-relationship-with-a-man.
And it still tells us more about the DV-er than the DV-ee (except of course out of all people in a relationship with a man, most are female).