If that were the case, then BIOAQ would never have had to file for Bankruptcy in the US at all.
The purpose of Chapter 15 is not to duplicate the day-to-day judicial minutiae of asset disposition. But the US Bankruptcy Court still has ultimate jurisdiction over BIOAQ as a US incorporated Company. CCAA does not, and is not, doing anything to BIOAQ beyond the liabilities of the Canadian subsidiaries they guaranteed.
That is why BIOAQ common shares have not been mentioned in the CCAA proceedings - the Canadians have no authority over them. The US Court does, and they will be cancelled under US law.