The EU doesn’t have laws. It has directives and regulation. These are converted into law by member states.
The EU doesn’t have any regulation or directives about the inadmissibility of evidence; that is a national concern. The only area the EU has directives for regarding evidence is the cross-border admissibility of evidence from one country being accepted in another.
This is in line with the principle of subsidiarity, which means the EU only concerns itself with trans-European issues.
This is technically correct, the best kind of correct.