Dear MalcolmPerfect,
Good day to you!
I hope you are doing well. Thank you for reaching out to us. We genuinely want to assist you in resolving the issue you’re experiencing.
As community moderators, we have limited resources for in-depth troubleshooting, and unfortunately, we are unable to take remote sessions. However, we can share some general troubleshooting steps that may help resolve the issue.
May I ask if you have tried resetting OneDrive during this issue? If not, I highly recommend resetting OneDrive, as it often resolves unexpected syncing or functionality problems. For your convenience, here is the official Microsoft article with detailed steps on how to reset OneDrive: Reset OneDrive - Microsoft Support.
Additionally, I suggest clearing both Office and OneDrive-related cache from your computer, as cached data can sometimes cause issues.

I would like to acknowledge that my initial response may not resolve your current situation immediately. However, with your input and some additional specific details, we can work together to identify a clear solution for your current challenge.
Thank you for your understanding. Your cooperation and contributions are greatly appreciated.
Kind Regards,
Nahid Sultan