Hello,

As a workaround, you can try to use Business Importer app to import Checks and other entities from .xlxs files into you QBD Company.

It also has many useful features as Export and Schedule Import. 
The app has 14 day free trial period, so you can test if it suits your needs.
You'll find it here https://desktop.apps.com/apps/167128/business-importer

I hope it will save you a lot of time!