The Eb1-I guys maintain a tracker for MSC with a sample space of > 500 people. According to it, 39% of the people that applied after October 1st are yet to get biometrics appointment. I follow it to get a general idea of approvals.
https://docs.google.com/spreadsheets...#gid=497246112
There are also a couple of Chinese telegram groups that crawl the USCIS case status page to figure out the rate of approvals. There is a decent spike in activity over the last couple of weeks. But, still a long way to go for them to not waste any GCs.