It is not possible to force a complete synchronization towards the marketplace by yourself. These processes are all automatically started by a schedule. If you would like to know more about the synchronization times, read this article.
We can force the synchronization when there is a high emergency, like a seller dashboard that's empty or stock or prices which are incorrect on the marketplace(s). But only when the urge is high.
We don't force these processes to speed up the creation of product information or other situation that doesn't have any emergency.
If you need any help, contact us and we're glad to help you out.