I am part of a team that needs to use the BGxx family of modems.
Why are you not making your drivers public instead of sending them by mail to everyone? It makes it unnecessarily hard for everyone to keep track of releases and making it difficult for companies to integrate your product because you are adding a lot more steps.
I need to see the code in order to integrate it in an IoT product. The compiled Linux drivers are not enough.
Ideally you would also share the firmware for your products, but the drivers are the bare minimum in my opinion.