Can the EG91 run user applications on the module?

I am new to Quectel and have not had too much luck searching the website. I am wondering if a user application can be made to run on the EG91 module. Is there an SDK? C-compiler? What processor, operating system, etc.? Or can it only communicate via USB/Serial/etc. to a separate external host processor? There must be some basic information on this, if it is possible. I’ve seen vague references to ThreadX, Linux, and QuecOpen(?), but I have no idea if any of this is related to the EG91.

Thank you.

Hello, the standard module cannot run the program, our open module and smart module can. Welcome to buy.