Referencing this post which shows the March 2023 changes to the Charter.
With elected ministers, the Prime Minister was in charge of overseeing the collective Cabinet agenda. While each minister was elected on a different platform, the Cabinet would usually convene privately to discuss its agenda for the term. The agenda usually mixes and mashes central ideas from each minister’s campaign.
If there was a dispute within the Cabinet, “majority decision and collective responsibility” were the decision makers. The Prime Minister did not have a weighted vote, and their sole vote should not decide anything.
The Charter was a little vague in stating that the Prime Minister “may give directions or instructions to the ministers.” You’d probably have to ask someone else about what that meant exactly.
Admittedly, I’m not the best person to ask regarding these questions. There are plenty of reasons why, which I can get into later. I probably did a sub-par job answering them, so you might have to go to Discord or ask someone else here.