Audacity projects save with no _data file

Im on macOS Mojave 10.14.4. Im supposed to submit an Audacity project for one of my classes together with the _data file. However, whenever I save an audacity project there is no _data file that accompanies it. I’ve tried opening with TextEdit but still cant find the _data file. I dont know if this is important but my audacity projects save as .aup3. Any help is appreciated!

From version 3.0.0 onwards there is only a single database file for each project -that AUP3 file holds the entire dataset, the whole project.

Aee this page in teh Audacity Manual:

And this one: