If you turn on the "Show context help" and then put your mouse over the XY graph on the diagram, it shows that if you create multiple XY clusters (as in your case 1) they can be fed into a "build array" and then fed to the XY as the case I've attached.
P.M.
PutnamCertified LabVIEW Developer
Senior Test Engineer North Shore Technology, Inc.
Currently using LV 2012-LabVIEW 2018, RT8.5

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