The official number for 2020 appears to be 25 (not including last week), however conservatives seem very interested in representing this as a list of "people BLM murdered" when it's really a list of all deaths due to political violence. It includes people who were killed by police, individuals murdered by far right individuals, and that one guy shot by a left wing extremist at a protest.
I'll give you one: David Patrick Underwood, May 29th. But that's not the point.
The point is: even if you count all of the deaths related to all the events around BLM protests - 19 [1] - these were over 7 months of protests, across the country, against the violence that black people see every day impacting their lives perpetrated by the people tasked to enforce the law and ensure security. On the other side you have 5 deaths in a few hours during a protest - supported by the sitting President - against the results of free and fair elections that they just didn't happen to like.
These are not the same - by any stretch of the imagination.