The TGA approved over 9k applications last year. ( annual...

The TGA approved over 9k applications last year. ( annual report)
The TGA labs reviewed around 2k samples of products/drugs last year and these include responding to problem reports and complaints about and compliance of existing products. (TGA website)
Whilst the TGA labs provide technical advice on applications this does not fall under the TGA test results the OP refers to.
It is by no way clear that the Medicines Regulation Division and the Medical Devices Branch of the TGA who make the decision has required any testing of colostat by the TGA labs.