I would add there was an email that was sent out on April 5 to all the members, and it says:
Access to IRCC continues uninterrupted; Members of Parliament have direct access to the dedicated line to the department of Immigration, Refugees and Citizenship Canada. All MP case enquiries are handled directly by the dedicated division, which is separate from the general public line. By the end of the year we will implement an enquiry system under one central number to manage all enquiries related to IRCC, which will remain solely available to Members of Parliament. This system will further ensure that Members of Parliament receive the most expedient and informative service possible to assist them in helping their constituents and managing their cases.
This came on April 5.