I believe that Flock has been marginally involved in some of these cases, but as I understand it CSAM cases are primarily online - tracking material, connecting it to the people who create it, sell it, and buy it.
I've said this elsewhere, but the issue with Flock is legal and cultural, not technological. There are already millions of cameras out there recording the public, and that footage is regularly used in criminal investigations ... with a warrant. If you have the footage, doing the movement reconstruction is not difficult with modern AI (manually it is extremely time intensive).
What Flock is doing is providing local governments with what they claim is a legal end-run around the 4th Amendment. However, courts have consistently ruled that the government is NOT allowed to use a civilian or a nongovernmental entity to bypass constitutional protections. It seems likely that the lawsuits that are already in the works are going to put them out of business.