How long did it take for you to move it to "Finalized" from "Received" ? ..I am sure they are drafting the grant letter for you .. Good Luck..No you don't need to inform. They will upload the documents and CO will know it by himself and no need to do anything from our side.
If they are not moved to Finalized then you should worry about it. But after being finalized it been like 2-3 days I haven't heard anything about my grant