Not sure about public officials, but here's an open letter explicitly supporting the protests by nearly 1300 various public health and infectious disease professionals ("We support them (protests) as vital to the national public health and to the threatened health specifically of Black people in the United States."):

https://drive.google.com/file/d/1Jyfn4Wd2i6bRi12ePghMHtX3ys1...