The 330 and 332 were added to the EASA TCDS of the 225 2 years after the 225 was certified (as a new type). The 225 certification basis was JAR-29 as of 1999 albeit with a very small number of exemptions and deviations.
Sorry, you couldn't be more wrong if you tried! For a start why would an older variant be added retrospectively to a new type certification?
The 225 was never a new type. As an example it would not have been allowed to gain the exemptions and reversions to Jar 29 Amdt 1 if it were a new type.
Airbus made a conscious decision to not certify as a new type, driven primarily by cost (see above exemptions and reversions!).