As long as you specify Parquet as DBMS, FDM should still recognize parquet files with a .parquet extension, it does not.
FDM 4.11
FDM not recognizing parquet files with a .parquet extension.
Provided patch FastDataMasker-4.11.1008.0.zip and later will which resolved the issue.
Get patches from link: Test Data Manager (TDM) Support Patches (must be logged in to Broadcom Support Portal)