That seems like a reasonable take on the purpose of the fentanyl labs. How did they get the footage if it wasn't busted?

I can think of reasons why a lab wasn't busted
1. The RCMP weren't aware.
2. The RCMP didn't want somebody to know that RCMP were aware of it, maybe to track what/who was going in and out.
3. The RCMP were protecting a source.
4. ?

Without knowing more it's not possible to draw valid conclusions.