There are a few different ways that you can unhide multiple worksheets in Excel. One way is to use the Unhide command. To do this, first select the worksheets that you want to unhide. Then, go to the Format menu and choose Unhide from the drop-down menu. Another way to unhide multiple worksheets is to right-click on one of the worksheets that you want to unhide, and then select Unhide from the pop-up menu. You can also use the keyboard shortcut Ctrl+Shift+F3 to unhide multiple worksheets.
If you have a lot of hidden worksheets, it might be easier to use the Go To command. To do this, go to the Home tab and click on Find & Select in the Editing group. Then, choose Go To from the drop-down menu. In the Go To dialog box, click on the Special button. This will open the Go To Special dialog box. In this dialog box, select Visible Cells Only from the list of options and click OK. This will select all of the visible cells on all of the worksheets in your workbook. Then, you can simply unhide all of the selected worksheets by right-clicking on one of them and choosing Unhide from the pop-up menu.