Microsoft removed the OneDrive GPO from so you have to get it from a workstation
%localappdata%\Microsoft\OneDrive \<highest number>\adm
If you just want to look at the OneDrive policies, you can put these files your local store:
Copy ONEDRIVE.ADML to C:\Windows\PolicyDefinitions\en-US
Copy ONEDRIVE.ADMX to C:\Windows\PolicyDefinitions\