We are trying to create a custom column in the users' OneDrives to display some information reflecting applied retention labels. We achieved to create the colum through PnP.PowerShell and also apply CustomFormatter property with a format that also works on SharePoint Online sites.
Unfortunately the column shows just empty, the custom formatting seems not to be applied.
Digging a bit deeper, I found that custom formatting in SPO creates a div in the fields content with the class "sp-field-customFormatter". This doesn't happen in OfB, so I think that custom column formatting is not working in OfB as the needed scripts don't get loaded.
Can anyone confirm that or tell me that I am mistaken? ;)