There is no law allowing the police to do that in France so that can’t be what cooperation means.

In the case of Telegram, it was about providing meta data when subpoenaed and moderating the unencrypted part of the application.

There is little reason to believe it is about anything else here.

Edit: Happy to hear what the people downvoting actually disagree about as usual. At the moment I have read a ton of mud thrown of France here - including someone from GrapheneOS implying they won’t hire from France unless someone relocate which must one of the most hilarious take I have ever read coming from someone from North America - with very little actually substantial shared, which, to be fair, seems to be becoming the norm here.