It’s well documented that France is fighting with Wagner in their former colonies, as well as Russia undermining their influence there.
It’s also well documented that Wagner and Russian troops mainly use Telegram for communication, same as in Ukraine. Again, well documented.
And these messages are stored on Russian Telegram services.
Telegram was completely fine to use in France, until Wagner started causing issues in Africa and then it suddenly became a problem.
But we’ll see what happens with the court case.