Not so simple.
The parameters of the Quantity (Min/Max/STEP/Default) for each Product is a Hierarchical Structure.
Product -> Product Category -> Global Settings.
In fact, it is even more difficult:
Product Variation -> Product -> Product Category -> Global Settings.
The value for each of the parameters is determined by this chain until it is determined.
That is why I say that in this version of the Plugin there is no ready to use the parameters of Quantity for external use as Object (JS).
But now, when you explained why this is necessary, I will try to add such an opportunity in the next version.