Once DRAS completes your ratings it does take some time for the PEB to receive it, put it in their queue, and eventually eyes on it. In my case it took 6 days after the VA was done before the PEB received for the ratings, but it has been another week and change after that without movement. I was told based on how many packages are in line ahead of yours at the PEB, it could take up to a month to receive your 199 from the time proposed ratings are completed on the VA side.
Your PEBLO should be able to see in VTA what specific date the PEB received your package back from the VA. More than a month after that I believe would be out of the ordinary, unless the PEB returned it to the VA for correction/modification.