That is absolutely not how DoD works. The vast majority of code is contracted out. Nobody from DoD side is reading any of the code. It's all a series of affidavits and audits for configuration management process. Vendors assert everything's cool. Failed audits lead to fines or revocation of access. And the audits check up on documentation and config. They don't dig into code.

At no point in time is anyone, anywhere, in this process reading every single line of code. Not even A single line of code. I doubt they even read the Software Bill of Materials we're supposed to generate, because I've never heard any feedback on any of it.