I've checked again, and most posts about fines\arrests that i was able to find were related to screenshots of groupchats, and no data requests were done to whatsapp itself. My bad.
Viber worked actively with cops while their head office was in Minsk, even after Rakuten acquisition.
VK, and other companies that are located in Russia, especially those that are owned by mail.ru group, are actively working with cops.
While it may vary by the government or jurisdiction in question, whatsapp is definitely compromised at the LE/Judicial level in some places. This leads me to believe that in fact it is universally compromised, though I have no direct evidence to support that conclusion.
WhatsApp?