If you look at the Daily List on FINRA, where reverse splits will be listed, take a look at some of the ones (ones that have an SEC filing for the split) that have gone into effect this month. Then take a look at when they filed for it to happen.
Here are a couple of examples just from Friday 1/22:
These took around a month for FINRA to process. SNPW is going on 5 months since they apparently effectuated a R/S on 8/25/2020. Why is it taking so long if it is still going to happen? These other ones show that FINRA isn't that backed up or delayed, so what gives?