Though the blood pressure data is present and visible in Flow Sheet Control it is not getting displayed on the graph control but it displays the measuring unit on Y-axis correctly as shown in this image and the related config
"VitalsGraph": {
"type": "observationGraph",
"title": "Vitals Graph",
"config": {
"yAxisConcepts": ["Systolic", "Diastolic"],
"xAxisConcept" : "observationDateTime",
"numberOfVisits": 4
}
},