As per the National Visa Center (NVC), there was a 3.6% reduction in the green card backlog during July. In June, there were 351,821 pending cases awaiting interview scheduling (due to document verification), which dropped to 339,081 in July, marking a notable 3.6% decline.
Source* https://travel.state.gov/
Moreover, the count of green card applicants whose documents were approved and were in line for an interview also witnessed a decrease in July (378,475) compared to June (388,397).