OneDrive needs to be given permission to access all of the related files on the computer. To do this, please follow these steps:

1. Open OneDrive on your computer.
2. Select the Settings tab.
3. In the Settings tab, choose the AutoSave section to open it.
4. Turn on the toggle for Automatically save screenshots and files that you whave stored to the cloud.
5. When this toggle is on, anytime you take a screenshot or save a file, it will automatically save to OneDrive.

Once these steps are completed, the online version of OneDrive should now include all of the related files.