Hi Jaineel N,
Welcome to Microsoft Community.
This looks quite unusual. I tested this on Microsoft 365 for Excel and was unable to reproduce your issue. Please follow my steps again, and I have included some screenshots for clarity on what I did:
- Select all cells in the entire worksheet > Format Cells > Protection > Uncheck Locked.
- Under the Review tab in the ribbon > Protect Sheet.
- Check the boxes for Select locked cells, Select unlocked cells, Insert columns, Insert rows, Delete columns, and Delete rows, then click OK to protect the sheet.
When I right-click on the second column, I can see that my Delete button is enabled.
Deleting the second column yields the expected result.
Similarly, the Insert option also works as expected.
If you get different results when following the steps I shared, please try creating a new blank workbook to see if you can reproduce the issue.
Additionally, please share your Excel version information with me. If this problem is due to an Office update patch, I need to report this information to the development team.
What version of Office am I using? - Microsoft Support
I hope my explanation makes sense, and I look forward to your reply!
Best Regards,
Thomas C - MSFT | Microsoft Community Support Specialist