Hi Allan,
Its not Freereg.com but this site;
www.freereg.org.ukShe is definitely there under Anne (with a E) Mould

There is also a MARY Mould Christened 18 Nov 1792, Haughton, Parents JOSEPH/MARY
(not sure as she would be 30 when Anne was born, not impossible, but illeg Children were mostly to younger Women)
There is also a MARY Mould, 16 Nov 1800, Willenhall, to BENJAMIN/ANN
And interestingly a Mary Mould married a Richard THOMPSON 07 April 1822, St Peters, Wolverhampton. A Witness was a JOSEPH Mould.
A JOSEPH Mould Married same day, same Church, Witness Richard THOMPSON.
Is hard tp prove if this is your Mary Mould, Mother of Ann/e.