I'm not aware of a way of doing that directly, but if you implement Known Folder Move - https://docs.microsoft.com/en-us/onedrive/redirect-known-folders - then you could perhaps redirect Favourites to be stored in one of the Known folders - e.g. Documents\Favourites - so it would get included in the Known Folder Move.
I'm not aware of a way of doing that directly, but if you implement Known Folder Move - https://docs.microsoft.com/en-us/onedrive/redirect-known-folders - then you could perhaps redirect Favourites to be stored in one of the Known folders - e.g. Documents\Favourites - so it would get included in the Known Folder Move.