Is there any interest or development going on for Microsoft Onedrive support as a KIO slave? I know there are not that many users of Onedrive in Linux in general, because one of the main attractives of Microsoft 365 is Office, which is not avaliable on Linux.
I found one relevant project, but it has been abandoned. Microsoft does offer a public, documented API for Onedrive, so no complicated reverse engineering seems to be required.
KDE out of the box already has Google Drive support, so I don’t think it is a “do not interoperate with proprietary services” rule. Maybe Microsoft has different rules on ToS and app registration? Or maybe because Microsoft requires you to give them credit card info to register an app for production? Or is it just no one wants to develop and maintain it?