A super interesting topic and the truth is that if they did discover microbes or bacteria it is a sign that there may be life on that satellite.
And surely there is, because if they are already beginning to make noise in relation to this, it is because they already know much more than what they are telling us.
The work this person has done at the University of Berlin is very impressive, and the truth is super interesting. I will be pending in case you publish updates in relation to this topic that is very interesting.