How to map out user actions with connected features?

I am dealing with a new feature for our dashboard and I am trying to map out all the user's possible actions and connect them to features we have so I could see if we are missing something and improve flows. I already have user stories created epics/tasks but I need some kind of step-by-step approach of the user so I am thinking something between customer journey/user flow and service blueprint. What kind of tool or process would you use for this exercise?