You're correct.

"Several major cities, including Seattle, Boston, New York and Minneapolis, have specific policies against police recording with body cameras at protests.

Protesters have long been worried about surveillance at demonstrations, the latest twist being police use of technology like facial recognition and social media monitoring to identify people in crowds. Using body cameras as surveillance tools at protests threaten people's privacy and could have a chilling effect on free speech."

https://www.cnet.com/news/police-body-cameras-at-protests-ra...