Hi 31HP
Welcome to Microsoft Community.
I realize that you've encountered a problem with " Excel data ", and I understand how you feel. Don't worry, I'll do my best to help you.
Based on your description, what are you referring to when you say Excel data is showing up grayed out?Excel Data could be a tab in Excel or it could refer to your Excel file alone. If possible, it would be helpful if you could attach a screenshot of the complete problem in your reply, as this will help me better determine your issue and provide more accurate help.
Also, the fact that you were able to open the file on your iPhone means that you did not lose the file, so please don't worry.
I will wait for you to provide more clues and then help you!
Looking forward to your reply!
Best regards
Adrian.C-MSFT | Microsoft Community Support Specialist