Look, if there is one thing I know about immigration system in Canada, its this : Its NOT fair. NOT one single bit. It is designed with a view to keep Canada's interests but it fails even at that. For applicants, its totally unfair. Think about it, when pandemic hit, they gave you 90 days time to arrange for documents. 90 and not indefinite. But for them, there is NO GOD DAMNED limit. They can keep your application held up, for EVER!
For your case, I think someone forgot to press a button somewhere to finally clear your application.
If it helps, my wife has not got her BIL after 46 days. It usually comes with your UCI update. For us, it did not.