Power and data for an LED wall
A wall with no feed is a dark cabinet. Systems is the path from the rack to the picture: power first, then data, on the same route.
What belongs in Systems
Power to the cabinets. Data from the processor. The rack that holds that processor, and the AV handoff when the room needs one. One engineer owns the path. If the brief also needs the wall itself, that scope is named beside Displays, not instead of it.
This is not structured cabling for a whole building, and it is not scoreboard software. Those are different trades. If a job needs them, the quote says so after the room is seen.
What the form should already know
Whether the building has power for the wall, or whether that still has to be found. Whether the job is the feed alone or the feed plus a new wall. The number is written after those answers, not before.