I think it will be challenging to determine the portion of it that will go to specific areas, including mental health, because when it comes to funding for health issues, it's very difficult to follow the money. Money is fungible in an area of need such as health care, where there are billions of dollars spent in every jurisdiction, so it will be very difficult to determine the proportion of the $25 billion going to mental health.
Evidence of meeting #65 for Government Operations and Estimates in the 44th Parliament, 1st Session. (The original version is on Parliament’s site, as are the minutes.) The winning word was budget.
A video is available from Parliament.