I believe the modules are generally created by the vendors, in this case Google, but I could be wrong. Whatever Make can do is limited by the API and what Google allows via API.
I do believe your best bet right now is to create one Scenario that accepts as input the Google Drive file and where to find it, then process it according to your needs.
Then, you have ~5-10 separate Scenarios that all watch their own Drives and pass data on to your main Scenario.
Not that you’ll likely need it in this case, Make is also capable of creating Scenarios within itself, as long as you can provide JSON files to build them. You can export a blueprint of any Scenario, modify the JSON, then use Make to import it.
Here is where you can suggest/track platform and app improvements. https://www.make.com/en/app-improvement-ideas/
Tagging @Michaela and @vendy to fill in whatever I’ve missed here 