The personal data privacy limits in Austria specify limits of 100, 75 and 30 years for birth, marriage and death records, respectively (see "Personenstandsgesetz" or "PStG" for short).
The Austrian (catholic) birth registers for Waidhofen are still locked online at Matricula (see Search for 'Waidhofen'), because the books contains birth entries that fall into this limit.
So, we either have to wait, one may look if familysearch have the records of 1922 available, or -- if you are a direct relative -- you can request a research / copy from the Austrian authorities.
Or if you know a birth / marriage date for her father or mother, then one should be able to easily spot their parents in the records of Matricula.
Note: As far as I am aware of, there are only two Waidhofen (one at the river 'Ybbs', on at the river 'Thaya'), both of them in Lower Austria.