Evolution may or may not be true, but it is not a scientific fact. No one knows for certain whether evolution is true or not, but we certainly do know what is the state of our knowledge. The claim that evolution is a scientific fact is a claim about the state of our knowledge. And while there is uncertainty about evolution, there is no uncertainty about our knowledge.
We all know what the state of our knowledge is and, from a scientific perspective, that knowledge does not indicate evolution to be a scientific fact. Not even close.