I need to reverse the order of stack in mongodb altas chart - Stacked Column

Below is the screenshot of chart, as you see on hover Current spend needs to at the bottom but it’s on Top.

Screenshot from 2024-03-01 12-19-071920×1080 231 KB

Bellow is aggregation that I’m using.

[
  {
    $unwind: "$tieredReduction.formattedDetails"
  },
  {
    $project: {
      facility: 1,
      vendor: 1,
      productCategory: 1,
      contractExpiryDate: 1,
      contractEffectiveDate: 1,
      contractId: 1,
      priceReductionTierLabel:
        "$tieredReduction.formattedDetails.priceReductionTierLabel",
      priceReductionTierAmount:
        "$tieredReduction.formattedDetails.priceReductionTierAmount"
    }
  }
]