It seems important to understand how much that is happening and where. If that data, in combination with protest size/type data is available, it can help us better understand if protests or police are actually impacting COVID transmission (if either).
If we don't have that data available as case numbers come in, it makes the narrative of blaming protesters much more likely to stick, even if it turns out to be inaccurate later, and e.g. the primary cause is unnecessary police actions.
Is anyone doing this? (Does anyone want to start if not?)
The situation in local jails became a big issue at the beginning of the pandemic. I would reach out to a bail fund in your city (or read more on their web page) to see if there are useful ways to help their broader mission, which will include protestors :).
Some useful context in this slate article:
https://slate.com/news-and-politics/2020/06/bail-funds-donat...