A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
The best case scenario is that you may have inadvertently hidden the worksheet. Right-click any other worksheet tab yo see if the UnHide command is active. If so, select it then click OK to unhide the sheet.
Otherwise...
Worksheets deleted from workbook files are not sent to the Trash or retained elsewhere. Neither can it be Undone other than by closing the workbook without saving provided the file has not been saved since the sheet was deleted.
If the file is saved on OneDrive you should be able to recover a previous version.
Similarly, if saved locally a prior version can be restored if you have Time Machine active.
Unfortunately, even if successful none of those options will include other recent changes made to the workbook.