Hi Marka Irene, I can imagine how stressful this must feel youve been relying on that Excel file daily trusting autosave to protect your work and suddenly it looks like weeks of effort have vanished.
To resolve the missing Excel/M365 file issue verify sync settings on Android 16 to ensure background data is not restricted clear the Excel cache to refresh the file list check recent files on other devices for cached versions confirm that autosave is set to OneDrive/SharePoint instead of local storage repin the file shortcut from the cloud. review the OneDrive/SharePoint recycle bin for deleted versions.
When you saved and worked on the file throughout the day did you notice the autosave indicator showing it was syncing to OneDrive/SharePoint or was it only saving locally on the device?
Best regards
Lucky Charm