I can only tell you that the process for LMIAs, which falls under the remit of ESDC, must be followed and that employers are required to meet certain criteria.
Our department is not able to exempt certain professions. That said, there's nothing to stop employers from making applications to get access to workers. We don't impose any caps, as a rule.
Given the current situation, there are certain caps on the food and accommodation industries. Generally speaking, however, employers do have access to workers and may submit applications. Those applications are approved if they meet the specified criteria.