A JV SWE that is a solid (Sr) Net Eng can do some magic shit, they are worth their weight in gold.
Sw for Telecom is atrociously out of date, and we pay incredible sums of money for shit that was built in the 90s. A SW NE can save a company tens of millions of dollars a year with a little creativity and comparitively (to fang sw) basic software dev.
You are going to interview at top most software company. They hire the best! And trust me the competition is way tougher than you think. If you are at intermediate level on coding, try be an expert. They will hire the candidates with a good coding skill. That is why they have a separate coding interview. Otherwise could have merged with the networking one.
I would suggest practice more data structures related questions, as you already know parsing etc.
Even if you pass the phone screen, the onsite coding is also going to be a challenging one.
Network Engineer here. I have interviewed at F, G, A. Do not be under the impression that you dont need to know hardcore scripting for Facebook. Their programming screen was more than intermediate level of difficulty. They expect you to know time and space complexities as well. Google was intermediate and Amazon was the easiest, you just need basic level of scripting.
Also I see you mentioned netmiko but my experience has been that netmiko or any SSHExpect related libraries are used only if they dont have any other option to configure the devices. FAANG companies are working at a huge scale and operate, use and rely on configuration via API. That being said it doesnt mean that whatever you have learned is useless, but you cannot rely on just knowing netmiko will give you an automatic pass. I would recommend looking into requests library and practicing your API scripting.
Just a question, not sure what you mean by "technical" and "scripting" interview. Generally we refer to the process to a techinical phone screen interview, which includes a problem you have to write code to solve, then onsite interview which has behavioral, technical (coding), and maybe system design rounds.