A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hi Naysha,
When you protect a worksheet, all cells are locked by default, which means that the worksheet cannot be edited.
We suggest that you refer to this article: Lock or unlock specific areas of a protected worksheetfor more information on how to unlock specific cells and ranges in a protected worksheet.
To know how you can update the data in an existing chart and change the data source on the worksheet, you can refer to this article: Update the data in an existing chart.
Let us know if you need further help.