Getting JSON to Excel Table

I'm in the final step of converting JSON output from an API call into an Excel table. Power Automate is using Office Scripts to transfer the data into an Excel table but it is doing so in an incorrect format. The output that is being fed into the script looks like this:

"Id","ClientName" & "QBOName" = my table's headers.

When I run my script, my table ends up looking like this:

When it's supposed to look like this (including all the other info in the rows below):

I'm using a script from a blog of my friend @DamoBird365 https://www.damobird365.com/split-a-workbook-into-multiple-worksheets/. The script looks like this:

function main(workbook: ExcelScript.Workbook, 
 MainTable: string = "Table1", //new table name
 worksheetInformation: WorksheetData) {
 
 // Get default worksheet Sheet1
 let sheet = workbook.getWorksheet(`Sheet1`);

 // Create range based on the size of data 
 let range = sheet.getRangeByIndexes(0, 0, worksheetInformation.data.length, worksheetInformation.data[0].length);

 //Populate sheet with data
 range.setValues(worksheetInformation.data)
 
 //Autofit column width
 range.getFormat().autofitColumns();

 //Create New Table
 let newTable = workbook.addTable(range, true);
 newTable.setName(MainTable); 
}

// An interface to pass the worksheet name and cell values through a flow.
interface WorksheetData {
 data: string[][];
}

@DamoBird365, or does anyone know the adjustment I would need to make to the Script? I noticed that the only difference between the output from my ComposeArray action (output being used in the script) and the input the script is showing after the flow runs, is an additional square bracket as per the pic below: