You seem confused, let me help: A not guilty verdict does not mean innocent, it means not guilty. OJ was not guilty, for example.
I'm not arguing Trump is innocent or guilty, just pointing out that there is a point in between "exonerate" and "unable to establish guilt".
A not guilty verdict absolutely does mean innocent in the eyes of the law. Unless you can demonstrate that there has been a miscarriage of justice (as in the Simpson case), he is innocent.