From M$:

>Hide OneDrive in Windows 10/11

>OneDrive is built in to some versions of Windows and can't be uninstalled. But you can hide it and stop the sync process, so it stays hidden.

They essentially integrated it into the OS. It’s their file manager. This is easy info to verify.

Source: https://support.microsoft.com/en-us/office/turn-off-disable-...