Having finally had my interview in Lapa on 19 February after 178 days of waiting, I was told that my CRNM would be ready in 30-60 days.
Decided to check in on the status of my CRNM tonight and found that it was delivered to Lapa on 22 February. That's three days after my interview. Not sure if this is an anomaly, considering the pandemic and all, but I'm not arguing.
Made the agendamento just now; from the looks of the schedule, they're doing this all day long. Not even sure if I'll have to actually "wait", as on my last visit the guy out front called for everyone at once who was looking to retrieve documentation, maybe every 10-15 minutes.