Running two What-If scenarios to add VMs and hosts to a cluster results in 0 days remaining in the CPU (Demand) tab, but the "Projection with current Scenario" line is not visible.
VMware Aria Operations 8.x
The graph in the result is scaled to the "Usable Capacity with current Scenario" line. If the "Projection with current Scenario" line is not within this scale, it will not be visible on the results graph.
The VMware development team is aware of the limitation and is evaluating a modification to the graph scaling behavior in a future version of the product.