Sadly Germany, a country that should know how bad it is to have the government have access to everything, is pushing for this.
Just about 32 years ago the Berlin Wall fell and shortly after the Stasi files were proudly presented as an example of tyranny. Now the German government wants to do the same.
French intelligence agencies pushed some domestic legislation to let "black boxes" (the media's word) designed by them have access to telecom networks a few years ago. I think it passed.
There are lots of people in the various institutions of EU, some are bound to support mandatory CSAM screening.
But I very much doubt actual such legislation will get enacted. There is not even an actual proposal yet, only articles like this saying one is coming soon.
We do know CSAM screening legislation is coming as the current voluntary rules have a 3-year time limit - but it is, in my opinion, very unlikely there will be mandatory screening, despite some people reportedly pushing for it.