Cabinet as a whole didn't know it was happening. Neither did the full NDP caucus. Some were consulted on specific issues. Finance Minister Chrystia Freeland was brought in to talk about the budget needs. NDP health critic Don Davies said Tuesday he also worked to provide information to the leadership team.
Going inside the room: How the Liberal-NDP confidence deal happened
https://www.nationalobserver.com/2022/03/24/news/going-inside-room-how-liberal-ndp-confidence-deal-happened