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Yup, the fiber optic cable connects all those items together, so if any one component/connection fails, it brings the whole show down. Often there is a fiber optic test loop contained in the tire repair kit in the cargo area...looks like a black plastic loop with wire connected, but that is fiber optic cable. It's used to insert at each location to bypass the radio head, for example, or amplifier, etc., but if you have multiple errors showing you might need more than one optical test loop...cheap on Amazon.
You didn't mention which speaker system you have...Bose, B&O, etc., but do be aware there are common failures with the MMM circuit board getting damaged from spilled drinks (below the MMI controls), and also there's known rear sunroof drain leaks that allow water to run down drain pipe and drip right on top of the Bose amplifier, and it kills the amplifier, etc. Both are very common issues on this Q7, and tons of threads on topic, as well as videos online.
The test you posted also shows electrical fault in the 5F module, so be sure to pay close attention to ALL fault codes, and with VCDS it will clearly label where the fault is occurring, and what control module is linked, etc. Always look up the exact fault code (Ross-Tech WIKI) to see what is the normal path to resolution for that error code.
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MMI not working
