so...what's the big deal? the big deal...is that they are not worried with all this...at all! Do you know why ? because air gapped hacking is for stupid victims; those who are not stupid protect the optical communications, and do not aloud exfilitration of data trought light. So, if you don't want to be hacked, you open the board, you implant this microcontroller...and then...bye bye NSA

The Lumentum switch protection module offers quick protection and restoration to prevent data loss due to cable failure, port failure, or catastrophic failures. An optical signal is split into diversely routed fibers. When a failure occurs, a 1x2 switch in the module selects the optical signal from the backup fiber.

This physical layer solution is able to isolate failures with a faster recovery time and simpler implementation compared to other protection solutions. It can be directly mounted on printed circuit boards

https://www.lumentum.com/en/products/switch-protection-module