Hello Champ,
My apologies for the delay. In case it helps. A good place to start is the USB specification document, which you can find online. It is not very didactic, but it does allows you to look for how the descriptor is handled, for example.
https://www.usb.org/document-library/usb-20-specification
That would be the correct place to change the string for the USB descriptor.
When working with the USB specification it’s also a good to consider USB forums as many questions are possibly answered there. There are also community threads from customers that may help.
I hope that this information helps!
Regards,
Gustavo