I just googled lawsuits and shingles vaccination. I got many hits which were from law firms essentially advertising for their class action lawsuits against Merck for alleged adverse reactions to Zostavax, I didn't see any about Shingrix.
The lawsuits claim the vaccine caused anything from a mild rash, to actual shingles , to brain swelling to death, and many others. I didn't see anything about them causing PN.
Most of the postings about class action lawsuits I read were poorly written with many factual errors and to my mind baseless claims, but that's the way they work. There are often settlements made by the manufacturers because it is the smartest financial decision, not because the claims are correct.
I have not taken the time to research the results of these lawsuits, because I am convinced the the benefit of the vaccines outweigh any of the rare adverse reactions, real or imaginary. The results of lawsuits are a legal, not medical matter, and often have nothing to do with the accuracy of the claims.

@dont, I noticed that you wished to post a URL to web resources with your message. You will be able to add URLs to your posts in a few days. There is a brief period where new members can't post links. We do this to deter spammers and keep the community safe. Clearly the links you wanted to post are not spam, so allow me to post it here.

Don, found these 2 articles on potentially reversing PN:
- Study finds drugs that can reverse nerve damage https://www.sbrc.ca/2017/01/study-finds-drugs-that-can-reverse-nerve-damage/
- Anti-Muscarinic Drugs May Reverse Peripheral Neuropathy https://www.practicalpainmanagement.com/resources/news-and-research/anti-muscarinic-drugs-may-reverse-peripheral-neuropathy

Hi @dont
No, I don't know of any lawsuits against Shingrex, but I'd be surprised if there weren't any. Pharma gets sued for almost anything these days, whether there is merit or not. And remember, no medicine or vaccine is perfect or without adverse reactions. The overwhelming evidence is that Shingrex benefits outweigh the risk by many orders of magnitude.
A cursory web search will turn up numerous class action suits against Zostavax.