What are your grounds for your lawsuit? You don't have any. I find it hilarious when people start saying let's start a lawsuit with no legal grounds whatsoever.
We are all dependent on the goodwill of IRCC at this time.
Of course we have some, otherwise I will not make this claim.
1. On August 17, 2020 in Hamilton, ON, Canadian Centre for Occupational Health and Safety (CCOHS) has released the e-course Pandemic Planning: Reopening for Business, to help organizations across Canada safely return to work during the COVID-19 pandemic. Not recognizing the online courses during COVID-19 would contradicts the CCOHS measures.
2. In Muhandiramge v. Canada (Citizenship and Immigration), 2009 FC 752 (CanLII), the Canadian Education Credential in French is written as diplôme canadien. And their current policy means the IRCC does not recognize Canadian Diploma during COVID-19. They would breach the procedural fairness.