Yes it is, and the American Red Cross (who are involved in blood donation) also say there is no evidence it can be transmitted by blood.
I've long thought many diseases are unknowingly transmitted through blood transfusions, and I've run across testimonials of people with ME/CFS getting it after a blood transfusion. I've also read it's long been known that ozone kills pathogens in donated blood, while leaving the health of the blood unaffected.
An author (Ed McCabe) who wrote a book on oxygenation therapies has long advocated for universal ozonation of donated blood to prevent these kinds of infections. Seems during this time of the the coronavirus would be a good time to start implementing such a strategy.