Your account can read the roadmap but not change it. Ask an admin for editor rights if you need to move things.
Every block in one order, highest first. This cuts across all five teams and all four phases, so a MyTrip block can sit above an API block if that is what you decide. Drag a row and everything renumbers.
#BlockTeamPhaseSizeResponsible
One row per person, and every block they are responsible for. Sprint totals are coverage, not workload: being responsible for a block does not mean building it alone.