In my experience it's very common for Z-Library's domains to get seized. My password manager has like 10 different domains connected to the same zlibrary account; 9 of which doesnt work anymore.
Best place you can see the currently working domain is wikipedia.
This makes so little sense to me. One would think that an app would have a wider user base as well as being easier to take down. All they would need to do is run the app and see where it phones home to, then send a C&D to the distribution platform(s).
i remember when soap2day was a thing (it was one of the better web ones without downloading that we could easily use on the PS4 without a USB stick etc) they had soapgate.org which would give a list of the current working domains. different domains would go down but until they shut the entire thing down I never saw soapgate change