That's very close in its design or its nature to a subsidy. In the case of subsidies, my understanding is that the amounts of subsidies that corporations and businesses receive tend to be public, generally speaking. In the case of the wage subsidy, there could be competitiveness issues in some instances, but generally speaking, I think the amounts that corporations have received should indeed be public.
Now that the government is disclosing who receives them, the competitive disadvantage, if there was one, has probably been eroded already. Disclosing the amounts would be more transparent.