This shouldn't be obscure, there is an official page about it.
Straight from the source:
www.playstation.com
You can always get a refund on purchased games as long as you have not downloaded or streamed the game.
You can always get a refund on pre-orders before the release date.
The only way to get a refund on a game you have purchased and already downloaded/played is if the content is deemed faulty.
So basically Sony has not changed its policy just for Cyberpunk, they simply put the game in the faulty category and to avoid further mass refunds requests they pulled it from the store and that's it.
I remembered wrong about the 2h thing, it doesn't seem to be ever mentioned in the policy and it's not true that you have to beg the consumer service to get a refund if you have respected the rules, that's probably true as an exception if you have already started playing a game.