Hi Julia Coy,
Thanks for visiting Microsoft Community.
From a design and security perspective, a protected worksheet is intended to prevent the protected data from being selected, copied, and modified.
If you are the owner of the worksheet, you can first remove the protection from the worksheet. When re-protecting the worksheet, ensure that both "Select locked cells" and "Select unlocked cells" are checked. This will allow the content to be selected and copied even when the worksheet is protected.
If you are not the owner of the worksheet and cannot remove the protection, it is recommended to communicate with the owner of the worksheet and discuss further actions.
I hope the above information clarifies the current situation. If you have any other circumstances that require further assistance, please explain your situation in your reply.
Best Regards,
Jonathan Z - MSFT | Microsoft Community Support Specialist