Solution
In order to read data from an specific excel worksheet you can use the Excel Get Worksheet.vi and the Excel Get Data.vi. You will see these VIs located at the following palette: Report Generation>>Excel Specific>>ExcelGeneral:
The Excel Get Worksheet.vi worksheet index input will let you configure the specific worksheet you would like to read from. Use the following code as a reference.
A 2017 32-bit LabVIEW example and a 2020 32-bit LabVIEW is attached. The zip folder contains the program and an Excel file with three worksheets and different types of values.