Nothing you can do

BPC is really a black box. There is nothing you can do. I read all forums every day but cannot find anything that can speedup their process. It's by pure luck. It was claimed that all backlog will be eliminated in 12 months. If yours is RIR, it is expected to be completed soon.

You can apply a PERM now as a backup. But with the current retrogress, I doubt that it will speed up your process.