Muller also passed on the evidence to other agencies (In NY, NJ, and others) to actually charge him with crimes. As he has done his entire career, since the only ones that can Charge a sitting president in office are Congress. That's how he gets convictions, he sends his findings to those who Can get those convictions.
It's not over, just because the man that was hired to make all this go away says the report "Exonerated" the president. Also, am I the only one that finds it odd that the report went to the White House to be redacted first? Trump's team gets to Edit it before it goes to Congress? (Who can remove, or impeach him.) That's like Escobar designing his own prison.