It would not surprise me to see the pace of online tests and virtual oaths being a discussion point between the union and IRCC. The reason is simple - what starts as a remote-working solution during COVID, has the potential to gradually increase automation and reduce the number of IRCC employees required to process a given number of applications.
Unions of all stripes (not just government employee unions) have increasingly been adding automation to collective bargaining agreements. They see automation as a bad thing that should be resisted, similar to offshoring. See here for example How Unions Can Protect the Workers Vulnerable to Automation (uniontrack.com).
What’s your point then?